出租汽车车内视频广告应符合（）等要求。
A.娱乐性强
B.可按乘客意愿开关
C.音量可控
D.利润可观
参考答案：B, C
-What made the student so upset?
-_______ to go to the movie
A．Having not been allowed
B．Not having allowed
C．Because of not having allowed
D．Not having been allowed
开采突出煤层时，必须采取（）等区域综合防突措施。
A.区域突出危险性预测
B.区域防突措施
C.水利疏松
D.区域防突措施的效果检验
