安徽下肢层次解剖模型（7部件）(临沧心肺触诊听诊电脑模拟器) (今日更新中)

MOSCOW — Russian opposition politician Alexei Navalny is in a coma in a hospital in Siberia after falling ill from a suspected poisoning.His spokeswoman, Kira Yarmysh, said Navalny felt unwell on a flight to Moscow and the plane made an emergency landing.Yarmysh said Navalny lost consciousness and must have consumed poison in tea he drank before boarding his flight.Russia’s state news agency Tass reported the politician is in grave condition.He is the most prominent member of Russia’s opposition and has set up a network of campaign offices across Russia to put forward opposition candidates in regional elections, challenging members of Russia’s ruling party.Several politicians and other prominent critics of President Vladimir Putin have been poisoned in recent years.In 2018, former Russian spy Sergei Skripal and his daughter, Yulia, were found to have been poisoned in Salisbury, England.In 2012, Alexander Perepilichny — a prominent Russian businessman and whistleblower, died while jogging of suspected poisoning, and in 2004, journalist and Putin critic Anna Politkovskaya survived a poisoning on an airplane, only to be shot to death two years later. 1173

NASA's OSIRIS-REx mission and the asteroid Bennu have had a date planned for two years, and just after noon ET today, they finally got to meet face to face. OSIRIS-REx fired its thrusters for a small burn, putting it about 4.3 miles from Bennu, marking the end of its journey to the asteroid.The mission -- which stands for Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer -- is NASA's first asteroid sample return mission. It launched in September 2016 and will spend two years up close and personal with Bennu. First images of the asteroid from the spacecraft's perspective have appeared as it got closer and closer.On Tuesday, the spacecraft will fly within 5 miles of Bennu, which will help design future orbits and map the surface.Over the next year, OSIRIS-REx will survey the asteroid using five scientific instruments on board the spacecraft. These instruments will help it determine a safe location from which to collect a small sample from Bennu's surface that will be returned to Earth in September 2023."Bennu's low gravity provides a unique challenge for the mission," said Rich Burns, OSIRIS-REx project manager at NASA's Goddard Space Flight Center. "At roughly 0.3 mile in diameter, Bennu will be the smallest object that any spacecraft has ever orbited."The sample from Bennu, a near-Earth asteroid, could help scientists understand not only more about asteroids that could impact Earth but about how planets formed and life began.OSIRIS-REx has a camera suite, a laser altimeter for 3D mapping, a thermal emission spectrometer to take temperature and mineral content and spectrometers to measure X-rays, nearly infrared and visible light.An arm mechanism called TAGSAM will reach out to collect the sample from Bennu's surface, making contact with the asteroid for five seconds in July 2020. During this contact, the arm will use a nitrogen gas burst to stir up rock and other materials on the surface so it can capture them. There is enough nitrogen for three attempts if the first is unsuccessful.NASA said the estimated 2.1-ounce sample size equates to about 30 sugar packets worth of dirt and rocks.The arm has a full range of motion, with joints capable of movement comparable to shoulder, elbow and wrist joints. It was "flexed" in space for the first time on November 14."The TAGSAM exercise is an important milestone, as the prime objective of the OSIRIS-REx mission is to return a sample of Bennu to Earth," said Dante Lauretta, OSIRIS-REx principal investigator at the University of Arizona, Tucson. "This successful test shows that, when the time comes, TAGSAM is ready to reach out and tag the asteroid."In 2021, it will be time for the spacecraft to essentially turn around and begin its two-year journey home. The sample will be packed into a capsule that will drop in the Utah desert in 2023.For two years after the return, the sample will be cataloged and analyzed. Afterward, 75% of the returned sample will remain at NASA's Johnson Space Flight Center so it can be used for more research by scientists from around the world.Why did NASA select Bennu out of the 780,000 known asteroids in our solar system?It was discovered in 1999, and scientists have been studying it ever since. The asteroid fits a number of criteria that make it intriguing and convenient.Bennu is relatively close to Earth, and its orbit even crosses that of our planet, making a close approach every six years. Though small asteroids can rotate very quickly, Bennu has a diameter just a bit bigger than the height of the Empire State Building and rotates relatively slowly, each 4.3 hours. This means OSIRIS-REx can match its velocity and touch down briefly.The asteroid could pass close to Earth, closer than the moon, in 2135, with even closer approaches possible in 2175 and 2195. A direct hit is unlikely, but the data gathered during this mission can help determine the best ways to deflect near-Earth asteroids.The asteroid is also old and well-preserved, full of valuable materials that may even contain clues about how life began. Bennu is essentially a leftover from the formation of our solar system billions of years ago, although some of the minerals inside it could be even older.This carbon-rich asteroid could be full of organic molecules, metals, platinum and even water -- the essential ingredients for life. It's because of objects like Bennu that these resources were delivered to Earth during its formation.Asteroids could even serve as fuel stations for robotic and human missions if we can unlock the hydrogen and oxygen inside them, NASA said.Bennu probably broke off of a larger asteroid in the asteroid belt between Mars and Jupiter a couple billion years ago. This knocked it through space until an orbit close to Earth locked it in place. And Bennu is believed to be a grouping of rocks held together by gravity rather than a single object.But its orbit drifts 0.18 miles each year toward the sun, and OSIRIS-REx will enable researchers to understand why and to predict Bennu's movements. This could also explain how it ended up as a near-Earth asteroid."The story of this asteroid is the story of the solar system," said Bashar Rizk, instrument scientist for OSIRIS-REx. "When we understand Bennu, we will understand something fundamental about our solar system."The-CNN-Wire 5356

NATIONAL CITY, Calif. (KGTV) — A police pursuit ended in a violent crash Wednesday, after a suspect hit two cars and injured a woman.National City Police said a car was stolen in Chula Vista overnight after the owner left it running. That car was found hours later by a National City school resource officer who detected it nearby on his lowjack system.The resource officer reported the stolen vehicle to police, leading to a brief pursuit with the suspect.The suspect made a sharp turn at Highland Ave. and 6th St., crashing into one car and sending that car into a second vehicle.A woman in the first vehicle that was hit was injured. She was taken to Sharp Chula Vista with unknown injuries.The crash ended right in front of a sign spinner working at the corner."All of a sudden I see they're chasing the car down this corner. He came this way, impacted that truck over there," the witness told 10News. "I was in shock the whole time. My jaw was dropped. I was scared, like, 'oh man I could've died."Police said the suspect was apprehended at the scene. Police added they found possible narcotics in the vehicle and believe the suspect may have threw something out of the vehicle during the chase. 1208

Millions of small businesses that received Paycheck Protection Program loans have been waiting for answers on how and when their loans would be forgiven. Now, the Small Business Administration has announced a plan that would forgive almost 70% of all the loans it gave out.“The new guidance that has come out from treasury department and the SBA aim to ease the process for applying for forgiveness of loans under ,000,” said Molly Day with the National Small Business Association.The new guidance forgives PPP loans that were ,000 or less, but also comes with a new rule. The rule allows businesses with no employees or businesses where the owner is the only employee, can now have most or all of their loan forgiven.Initially, most of the forgivable portion of a PPP loan was that which was used toward paying employees. The new rule also relaxes the scrutiny requirements on lenders to review documentation from small businesses proving how the money was spent.“A lot of small businesses don’t have employees, or they have one employee and that is themselves, adjusting that really makes it a lot more workable for the sole proprietors that are small businesses [and] are doing great work and deserve some assistance as well,” said Day.The forgiveness process laid out by the Small Business Administration does not have the usual red tape that comes with most government forgiveness processes. Business owners who received loans of ,000 or less have to fill out a one-page document, just released by the SBA, and have their lender process it.“I do think making the forgiveness process easier and more streamlined could help many small businesses,” added Day.With the loan debt hanging over their heads, many small businesses have been reluctant to take on additional debt or put more of their saving into their businesses. Relieving them of the loan burden could now allow them to do so and may result in saving some businesses that were on the brink.However, the SBA points out there’s no guarantee and is still pushing for continued support from Congress in the next stimulus bill. In addition, it is pushing for the SBA to extend the new guidance to loan 0,000 or less. 2195

NASCAR said in a statement on Thursday that the noose found in Bubba Wallace's garage "was real."The noose was found in the garage stall of Bubba Wallace last week at the racetrack in Talladega, AlabamaNASCAR released a picture of the noose that was found in Wallace's garage on Thursday. 296

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