阴囊内无痛性肿物哪些是无透光性的()
A.睾丸鞘膜积液
B.腹股沟斜疝
C.睾丸胚胎癌
D.精子侵袭症
E.精索,静脉曲张
参考答案:B, C, D, E
This room is_____, but it doesn't have _____.[ ]
A. enough big, enough windows
B. big enough, window enough
C. enough big, windows enough
D. big enough, enough windows
结束发电时,先切断(),再断开自备电闸刀,结束发。
A.动力
B.照明开关
C.动力和照明开关
D.总闸刀