中心静脉压的正常范围是
A.1~5mmHg
B.1~10mmHg
C.10~15mmHg
D.1~15mmHg
E.10~20mmHg
参考答案:B
— The sun isn't as big as the earth, is it?
— _____. [ ]
A. No, it is
B. Yes, it is
C. Yes, it isn't
D. No, it isn't
一物三口,有腿无手。谁要没它,难见亲友(打一日常用品)。