确定胎儿安危最简便而准确的方法是（）
A.催产素激惹试验
B.胎动计数
C.尿雌三醇测定
D.胎儿电子监护
E.羊膜镜检查
参考答案：B
把下列反意疑问句补充完整。
1. She is an excellent teacher, ______?
2. Jack plays football well,______?
3. They have never been to Beijing,______?
4. Let us go together,______?
5. Let's play basketball,______?
6. Don't be late for the meeting,______?
7. Listen to the radio please,______?
8. He didn't attend the meeting,______?
9. She can't get there on time,______?
10. They haven't finished the project, _?
述全球合作的中心环节是南北合作？
