【单选题】It’s widely accepted that young babies like to do things because certain acts lead to ________.
【单选题】By saying that the 'blast wave' from the explosion acts like 'an invisible wall of energy', the author intends to say that ______.
A.
blast can cause shrapnel or other bits of metal to slice through flesh like a knife
B.
its energy can cause a swath of disfiguring burns
C.
this energy wall can prevent victims from physical injury and obvious bleeding
D.
its tremendous energy can inflict massive internal injuries
【单选题】In the atmosphere, carbon dioxide acts rather like a one-mirror--the glass in the roof of a green-house which allows the sun' s rays to enter but prevents the heat from escaping. According to a weathe...
A.
prevent the sun' s rays from reaching the earth' s surface
B.
mean a warming up in the Arctic
C.
account for great changes in the climate in the northern hemisphere
D.
raise the temperature of the earth' s surface
【单选题】manager acts like an adviser
【简答题】(C) It looks like a mobile phone(手机), but the service is much cheaper. It acts like a mobile phone, but only in your own city. Beyond the city walls, it’s useless. “Little Smart”, also called “xiaolin...
【简答题】在Excel2007中,模板文件的扩展名为()。
【判断题】采用机械开挖沟槽时,应由专人负责掌握挖槽断面尺寸和标高。
【单选题】螺纹标记M20×1.5表示的螺纹类型是: