煤烟型烟雾事件容易发生在（）
A.高原
B.中午
C.交通拥挤的城市
D.气压较低时
E.山谷地带
参考答案：E
—What did your father ask you just now?
—He asked me ______.
A．Whom I was chatting with
B．where I am with my friends
C．when would I go home
D．if I have finished my homework
eNB目前支持的小区带宽配置为（）。
A.1.4MHz
B.3.0MHz
C.5MHz
D.10MHz
E.15MHz
F.20MHz
