髋关节后脱位的典型畸形是髋关节()。
A.屈曲、内收、内旋
B.屈曲、内收、外旋
C.屈曲、外展、内旋
D.屈曲、外展、外旋
E.屈曲、外旋
参考答案:A
In the spoken English of some areas in the US, the "r" sounds at the end of the words ___ . [ ]
A. are dropped
B. drop
C. are being dropped
D. have dropped
ODN的损耗主要分为三个部分,分别为()。
A、插入损耗
B、衰减
C、设备损耗
D、回波损耗