覆盖率多用Tx和Rx衡量，导频Ec/Io只能衡量信号质量，不能衡量覆盖情况。
参考答案：错
If you _____ his wife’s income____ his own，the total of their income _____ 3000 yuan.
A．add; to; will add up to
B．add; to; adds to
C．add up; to; adds up to
D．will add; for; adds up
温度越高，种子发芽越快（）
A.正确
B.错误
C.不准确
