脓毒症时氧输送()
A.增加
B.减少
C.不变
D.先减少后增加
E.先增加后减少
参考答案:A
解析:脓毒症时氧输送增加。
Mike looks ______ than Paul, but they are of the same age.[ ]
A. youngest
B. the youngest
C. younger
D. very young
1个带圆柱孔的工件用心轴定位,可限制其四个自由度。()