腹腔穿刺是用于()。
A.粘连性肠梗阻
B.腹腔内出血
C.消化道出血
D.急性腹膜炎
E.胃穿孔
参考答案:B, D, E
发动机曲轴转速与位置传感器可装在()或(),亦可装在()。
He has an expression of resentment, _____ Martin had made a fool of him.
A.as
B.as though
C.though
D.even though