Tripping defects in anchors frequently occ_爱下问搜题

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问题单项选择题

Tripping defects in anchors frequently occur in（）.

A.deep water

B.shallow water

C.stiff soils

D.soft soils

答案

参考答案：D

选择题

(2012·江西高考)We ________ have bought so much food now that Suzie won't be with us for dinner.

A．may not

B．needn't

C．can't

D．mustn't

单项选择题 A1/A2型题

下列描述去甲肾上腺素的效应正确的是（）

A.心脏兴奋，皮肤黏膜血管收缩

B.肾血管收缩，骨骼肌血管扩张

C.中枢兴奋

D.收缩压升高，舒张压降低，脉压加大

E.心脏抑制、支气管平滑肌松弛