小儿心力衰竭应用血管扩张剂时，最主要的是注意观察有无（）。
A.心律不齐
B.气促
C.头痛
D.血压下降
E.电解质紊乱
参考答案：D
A: How did your interview go B: ______
A．A manager interviewed me.
B．I couldn't feel better about it! The questions were very fair, and I seemed to find an answer for all of them.
C．I am fully confident that I answered all the questions to the needs of the interviewer.
D．I answered all the questions of the interviewer to his satisfaction. But he may discriminate against me.
工程中将压杆（）状态相对应的压力临界值称为临界力。
A.承载能力极限
B.正常使用极限
C.强度极限
D.临界平衡状态
