煤气压力低于（）Pa，不能点火。
A.700
B.800
C.850
D.900
参考答案：B
— You were late again, Peter.
—Sorry, I ______ to be here on time, but the traffic on the roads _____ heavy.
A．wanted; was
B．had wanted; was
C．wanted; would have been
D．had wanted; would have been
休克在血容量基本补足后，尿量多少提示可能有急性肾功能衰竭
A．60ml／h
B．50ml／h
C．30ml／h
D．25ml／h
E．＜20ml／h
