严重创伤时,全身代谢改变是()。
A.能量消耗增加
B.蛋白质大量分解
C.高糖血证,糖异生加速
D.脂肪分解加速,血中游离脂肪酸增多
E.以上都是
参考答案:E
Shawn returned to Iowa after the 2008 Games, , as is known to us, she had been brought up and trained to be a gold medalist of gymnastics.
A.when
B.that
C.there
D.where
两台离心泵串联工作时总扬程为M,每台泵单独工作时的扬程为N,两者之间的关系为()。
A.M=2N
B.M>2N
C.M<2N
D.M≥2N