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【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
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举一反三
【判断题】If the ownership of the companies is open to the public, we call them publicly held companies. They are companies with shares which can be purchased or sold by any member of the public.
A.
正确
B.
错误
【单选题】If the ownership of the companies is not open to the public, we call them
A.
closely held companies
B.
publicly held companies
C.
private company
D.
multinational companies
【简答题】正常情况下，人体皮肤、口腔、肠道等处存在多种微生物，它们对宿主无害，但可起到（）、（）、（）等作用。
【简答题】以下有4个用户标识符,其中合法的一个是
( )A. for B. 4d C. f2_G3 D. short
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