We couldn't catch up with the others bec_爱下问搜题

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问题选择题

We couldn't catch up with the others because they________too long before us.[ ]

A. started

B. were starting

C. have started

D. had started

答案

答案：D

单项选择题 A1/A2型题

伴高血压冠心病的肝硬化消化道出血患者，不易使用下列哪项止血措施（）。

A.三腔二囊管压迫

B.去甲肾上腺素胃管滴注

C.垂体后叶素静脉滴注

D.生长抑素静脉滴注

E.冰生理盐水洗胃

单项选择题

当锅炉设备弯管件弯头的弯曲半径R≤1.8Dw时，弯头的外侧壁减薄量6应小于等于______。

A．25%

B．20%

C．15%

D．10%