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【单选题】
关于流线谱,不正确的说法是( )。A.
物体形状不同，流线谱不同
B.
气流受阻，流线变稀疏
C.
物体后方形成涡流区
D.
流线谱的形状与流速大小有关
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【简答题】判断正误，正确（T），错误（F）。 Bob and Jim once worked in the same factory. One day, Bob lent him ten dollars, but then Jim left his work and went to work in another town without going back to the factory. Bob had...
【简答题】用括号中动词的适当形式填空。 Bob and Jim once worked in the same factory. One day, Bob (1)_________ (lend) Jim one hundred dollars,but then Jim (2)________ (leave) his job and (3)________ (go) to work in another to...
【简答题】One day, Bob took two of his friends into the mountains. They put up their tents(帐篷)and then rode off to a forest to see how the trees were growing. In the afternoon when they were about ten kilometer...
【单选题】下列有关 “丢失枪支不报罪”的叙述正确的是哪些?
A.
．甲是公安局的刑警丢失枪后及时上报但仍发生严重后果的，不负刑事责任
B.
．甲是公安局的刑警，不知丢抢而没报告，造成严重后果的，应定罪处罚
C.
．甲是监狱警察丢枪后及时上报，但仍发生严重后果的，应负刑事责任
D.
．甲是狱警，丢失枪后不上报，因落入犯罪分子手中成为了犯罪工具，应负刑事责任
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