结果1 题目 D. They've known how methane gas is formed on31. How do the NASA's scientists feel about their future exploration? A. Aimless. B. Confident. C. Stressed. D. Serious. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏 ...
The study showed that the mice kept much of the routines intact, including cleaning themselves and eating when hungry. Questions 22 to 25 are based on the passage you have just heard. Q22: What do Nasa scientists want to learn about?...
At first, they considered neutrinos, fundamental particles first postulated in the 1930s and then discovered in the 1950s, but because they have such little mass, scientists are doubtful they make up much dark matter. Other candidates are figments of scientific imagination. One is known as a ...
NASA, for instance hopes to build one that would get us to Mars in a matter of weeks [source: NASA]. But Santa's way ahead of the game. One reason it's hard for us to build a matter-antimatter engine is because of the lack of antimatter in the universe -- scientists believe that...
"Scientists believe that some of the oxygen produced in this manner could work its way into the moon’s subsurface ocean as a possible source of metabolic energy,"NASA explained. Related Stories NASA spacecraft keeps on going faster and faster and faster ...
It is interesting how NASA(美国航天航空局)chose their astronauts for landing them on the moon.They chose men 1 the ages of twenty and thirty-five.There were about fifty of them.Some were 2 air pilots, and 3 were scientists with two or three degrees.NASA telephoned each man they were ...
history of science. Along with Galileo, Gilbert had been busy practicing thescientific methodin his work and setting an example for his peers after the first decade of the 17th century had past. Here's what John Gribbin had to say about Gilbert and Galileo in his 2002 book "The Scientists...
How can scientists search for strange matter if no one's ever seen it? Well, they actually do know what bits of strange matter would look like on Earth if it weren't dangerous. It would resemble our regular atoms -- a positively charged core made of quarks, with electrons around -- on...
Tree size is often much more than just height. General Sherman, a giant sequoia -- one of two types of redwood found in California, the other being the taller, skinnier coast redwood we just mentioned -- is the world's heaviest and most voluminous tree at around 6,167 tons (5,595...
Scientists have proposed several theories to explain dinosaurs' extinction. There's not much physical evidence for some of them. For example, one theory is that dinosaurs were allergic to flower pollen — flowering plants and bees evolved together during the late Cretaceous period. However, flowering...