皮皮学，免费搜题
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【单选题】
下列各式计算正确的是A.
3a 3 +2a 2 =5a 6
B.
C.
a 4 ?a 2 =a 8
D.
（ab 2 ） 3 =ab 6
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举一反三
【单选题】— Was your father at home last night? — No, my father wasn't at home. He ______ to help to send the old man to hospital. [ ]
A.
asked
B.
was asked
C.
was asking
D.
had asked
【单选题】your father at work the day yesterday?
A.
Was; before
B.
Is; before
C.
Was; after
D.
Is; after
【单选题】山莨菪碱抗感染性休克,主要作用是
A.
扩张小动脉,改善微循环
B.
解除支气管平滑肌痉挛
C.
解除胃肠平滑肌痉挛
D.
降低迷走神经张力,兴奋心脏
E.
收缩血管,升高血压
【单选题】your father at work the day yesterday(前天) ?
A.
Was; before
B.
Is; before
C.
Was; after
D.
Is; after
【单选题】I ___ to your excuses for making so many mistakes.I shall report to your father at once.
A.
listened
B.
will not listened
C.
listen
D.
am not listening
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