矿井通风系统有较大变化时,应进行1次反风演习
参考答案:对
—How about going out for a break?
—________. We've been working for three hours.
A.Take your time
B.It's my pleasure
C.Come on
D.I totally agree
不符合体外循环后低心排综合征的表现是()。
A.血压下降
B.脉压小
C.尿量减少
D.心率快
E.中枢性高热