毛果芸香碱临床上主要用于治疗
A.重症肌无力
B.青光眼
C.术后腹胀气
D.房室传导阻滞
E.有机磷农药中毒
参考答案:B
利用建筑柱内钢筋作引下线,直径大于等于10mm且小于16mm时,应将()根钢筋绑扎或焊接,作为一组引下线。
A.2
B.3
C.4
D.5
Every host and router on the Intemet has an IP address, which encodes its
A.host number
B.host number and socket
C.network number
D.host number and network number