室内和小区分布系统维护的CQT测试指标中90%的覆盖区域Ec/Io≥-9dB，全部覆盖区域Ec/Io≥（）。
参考答案：-12dB
-Let's go and play volleyball.
-____.[ ]
A. Yes, I go.
B. Thank you.
C. OK. Let's go
We shouldn't do _____ at the table through the whole day, and we need to do more _____ if we have
time to keep healthy. [ ]
A. exercise; exercises
B. exercises; exercises
C. exercise; exercise
D. exercises; exercise
