孕妇自分娩之日起,到恢复至妊娠前的状态,一般需要()。
A、3周
B、4周
C、5周
D、6周
参考答案:D
I certainly wondered what my parents _____.[ ]
A. are doing
B. will do
C. would
D. have done
DoRevA在反向链路引入了HARQ-Hybrid Automatic Repeat Request,可以有效增加反向包发送平均时隙数,提高反向链路吞吐量。()