已知视网膜动脉阻塞最常见的原因是
A.巨细胞性动脉炎
B.颈动脉病
C.心脏瓣膜病
D.心律不齐
E.感染性心内膜炎
参考答案:B
The managing director promised that he would _____ me as soon as he had any further information.
A.communicate
B.notice
C.notify
D.note
杭钢煤气系统中,通往轧钢加热炉的混合煤气品种中没有以下哪种混合煤气?()
A.高炉煤气与焦炉煤气的混合
B.高炉煤气与转炉煤气的混合
C.焦炉煤气与转炉煤气的混合
D.高炉煤气、转炉煤气及焦炉煤气的混合