Ravi, like many project (1) , had studied

迷走神经兴奋可使心脏

A．心率减慢、传导减慢、心房肌不应期缩短

B．心率加快、传导减慢、心房肌不应期缩短

C．心率加快、传导加快、心房肌不应期缩短

D．心率减慢、传导减慢、心房肌不应期延长

E．心率减慢、传导加快、心房肌不应期缩短

The Internet has become part of young people’s life. _1. _______ report shows that 38% of students often use the Internet. Most of them get _2.________ (use) information on the Internet _3._______ use the Internet to help with their studies. But many students don’t use it _4.________ a good way. Some play games too much, and some visit websites __5.__________ shouldn’t look at. So bad things may happen __6._________ students spend too much time on the Internet.

__7._______ is important for students to use the Internet properly. Now we have a textbook, __8._______ uses many examples to teach students some good ways to use the Internet. It gives useful __9._______(advise).

Some students also make friends on the Internet. But if you want to have a face-to-face _10.__ ______ (meet) with your online friends, please let your parents know and meet in a proper place.

股份公司成立日期为( )。

A．创立大会召开日

B．发起人协议签署日

C．中国证监会批文签署13

D．营业执照签发日期

下列哪些是左向右分流型先天性心脏病共同点()

A．胸骨左缘有粗糙收缩期杂音

B．肺循环血量增多，易患肺炎，X线示肺野充血

C．一般情况下无青紫

D．当哭闹、患肺炎或心功能不全时可出现青紫

E．体循环血量减少，影响生长发育

在TD-SCDMA系统中，MidAmble码的作用有（）

A.上下行信道估计；

B.功率测量；

C.上行同步保持；

D.以上都不对