夹闭一侧家兔颈总动脉引起全身动脉血压升高,其机制是()
A. 血管容积减少,相对循环血量增多
B. 颈动脉窦受到牵拉刺激
C. 颈动脉体受到牵拉刺激
D. 颈动脉窦内压力降低
E. 颈动脉窦内压力升高
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Charter-party usually contains a clause states that payment must be made in cash without discount every 30 days in advance,and that in default of payment the shipowners have the right to()the vessel from the Charterers service.
A. send
B. withdraw
C. let go
D. take off
()是美国运筹学家萨蒂提出的。
A. 层次分析法
B. 德尔菲法
C. 回归分析法
D. 以上均不对
动词既能带名词性宾语,也能带非名词性宾语。
A. 正确
B. 错误