268. The limited supply of water has bee_爱下问搜题

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问题选择题

268. The limited supply of water has been put into practice, take care to turn off the running ____ before you leave.

A．radio

B．traffic lights

C．gas

D．Tap

答案

D

单项选择题

下列产品的单价(元／m^3)中最贵的是哪一种( )

A．加气保温块600×250×50

B．加气块600×250×50

C．加气保温块600×250×50

D．加气块600×250×300

单项选择题 A1/A2型题

冰冻解冻去甘油红细胞体外溶血试验血红蛋白增加率应（）。

A.≤35％

B.≤40％

C.≤50％

D.≤60％

E.≤65％