休克早期,由于儿茶酚胺大量释放,造成()
A.脑血管扩张
B.血压下降明显
C.血压升高明显
D.血管扩张
E.血管收缩
参考答案:E
I don’t think this question is ____than that one .It is ____of all.
A.easier, more difficult
B.easier, the most difficult
C.easiest, more difficult
D.easier, much more difficult
轴向压力N对构件抗剪承载力Vu的影响是( )。
A.不论N的大小,均可提高构件的抗剪承载力VuB.不论N的大小,均可降低构件的VuC.N适当时提高构件的Vu,N太大时降低构件的VuD.N大时提高构件的Vu,N小时降低构件的Vu