自耦变压器在运行中,中性点()接地。
A.必须
B.不
C.经避雷器
D.经熔断器
参考答案:A
下列属于恶性肿瘤的是()
A.结膜色素痣
B.结膜鳞状细胞癌
C.结膜 * * 状瘤
D.结膜皮样瘤
E.以上均是
.It was obviously that the man ______ driving on the free way for almost an hour when he ______ that he must come back.
A.was; was told
B.had been; was told
C.had been; told
D.was; was told