It was only then()how much trouble I had caused to him.
A. had I realized
B. that I realized
C. I did realize
D. did I realize
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下列关于我国西部地区的地理差异,正确的是( )。
A. 甘新多沙漠戈壁,青藏多大河湖泊
B. 陕甘宁地势低平,云贵川地形崎岖
C. 新疆的河流皆为内流河,西藏的河流皆为外流河
D. 青海高寒干旱,甘肃温暖湿润
在直方图中,质量能力处于临界状态时,表现为质量数据的分布()。
A. 充满上限
B. 充满下限
C. 充满上、下限
D. 无规律运动
Most people on Earth accept it fairly easily that US astronauts (宇航员) got to the moon on July 20, 1969. But there are those who do not believe it. The moon rocks were not evidence enough. Neither were the words of the astronauts themselves or the photographs. So the US National Aeronautics and Space Administration (NASA) (美国航空航天局) has asked an expert to write a book to prove that yes, indeed, Americans did land on the Moon. Actually, NASA has been going round and round in the argument for decades, but doubters still could be seen everywhere on the Internet.Those who doubt the Apollo moon landings maintain that the US lacked the technology to send humans to the Moon and was so eager to win the Soviets in the space race that it faked (捏造) the moon mission on movie sets. The doubters say the faking was done so poorly that there is enough evidence of cheat, including a picture of astronauts planting the American flag that shows the flag rippling (微微抖动) in the wind. The doubters claim there can be no wind on the moon, so the picture must have been faked. On its own web, NASA said that when the astronauts struggled to plant the US flag in the moon surface, they twisted it around a bit before it stuck. The rippling looks as if it were being carried by the wind. A NASA’s expert said he has no ideas about whether the upcoming short book will change every doubter’s mind. The author of this passage thinks that the evidence of American moon mission in 1969()
A. might still be doubted in the future
B. might not be argued about any more
C. is not really convincing
D. is yet to be proved
一个女人的父亲是色盲,她的兄弟中有两人和一个舅舅是血友病患者如果这个女人有一个血友病的患儿,则她的基因型必定是什么( )
A. XBHXbH
B. XBhXbH
C. XbHXbh
D. XBhXBH