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问题 单项选择题

待进食时药效已达高峰，使整个消化道在药物的作用下能正常蠕动的多潘立酮、西沙必利、胃复胺的服用宜在（）

A．SDA 

B．BP 

C．JP 

D．USP 

E．WHO

答案

参考答案：A

填空题
(-4)2
=______； 
8
3
=______；
(2-
5
)2
=______．
3
-2的相反数是______，倒数是______，绝对值是______．
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单项选择题

A block and tackle is “rove to advantage”. This means that the（）.

A.blocks have been overhauled

B.hauling parts of two tackles are attached

C.hauling part leads through the movable block

D.hauling part leads through the standing block
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