()登杆或在杆塔上移位。
A、可以少量携带器材
B、禁止携带器材
C、施工负责人决定
参考答案:B
-Must I do my homework now? -No, you _ _. You may have a rest.
A.mustn't
B.needn't
C.can't
D.wouldn't
很多高楼大厦的外墙安装玻璃墙幕,这对环境会造成()
A、光污染
B、大气污染
C、噪声污染
D、声污染