装有电雷管的药卷叫起爆药卷。
参考答案：对
The greenhouse effect comes into being because of too much _______ in space. [ ]
A. ozone
B. carbon dioxide
C. carbon oxide
D. oxygen
将PWSB上的拨码开关，拨为OFFOFFONOFF时表示（）
A.主机架
B.从机架1
C.从机架2
D.从机架3
