皮肤炭疽局部发生恶性水肿多见于()
A.眼睑
B.小腿
C.大腿
D.颈部
E.额部
参考答案:A, C, D
He has got the job because he has the advantage ____ others of knowing many languages.
A.over
B.above
C.against
D.beyond
在220V直流系统中,当负极发生金属接地时,正极对地电压为()。
A.零;
B.110V;
C.220V;
D.440V。