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问题 选择题

在研究落体运动时，某研究人员让一个小铁钉和一小团棉花同时从某一高处下落，总是小铁钉先落地，这是因为[ ]

A．小铁钉比小棉花团重

B．小铁钉不受空气阻力

C．小棉花团受到的空气阻力影响较大

D．小铁钉受到的空气阻力影响较大

答案

答案：C

单项选择题

M: The taxi driver must have been speeding.
W: Well, not really. He crashed into the tree because he was trying not to hit a box that had fallen off the truck ahead of him.
Question: What do we learn about the taxi driver

A. He turned suddenly and ran into a tree.
B. He was hit by a fallen box from a truck.
C. He drove too fast and crashed into a truck.
D. He was trying to overtake the truck ahead of him.
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选择题

2009年，中国GDP已经达到33万亿元，增长8.7%，但人均GDP仅相当于世界平均水平的四分之一，在全球排第110位。这一材料表明（）

A．我国现在达到的小康还只是总体的、低水平的小康

B．我国现在达到的小康还是不全面的小康

C．我国现在达到的小康是发展很不平衡的小康

D．我国必须坚持把提高经济增长速度放在首位
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