问题
单项选择题
口腔健康调查的抽样方法中没有
A．系统抽样
B．随意抽样
C．整群抽样
D．多级抽样
E．分层抽样
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
口腔健康调查的抽样方法中没有
A．系统抽样
B．随意抽样
C．整群抽样
D．多级抽样
E．分层抽样
参考答案：B
| 根据所提供的语景，从方框中选择正确短语的适当形式完成句子。（其中有三个多余词） | |
2. ________________________ will China be a superpower. 3. It's not good to give the child whatever he wants. _______________________ when he is crying. 4. Hearing her name called, the little girl _____________________ and was surprised to see her aunt standing at the gate waving to her. 5. My homework has been completed ______________________ time. 6. The visit is ____________________ improving the relations between the two countries. 7. Seeing a stranger break into her house, she _______________________ of what might happen next. 8. We should at all times _______________________ our own shortcomings. 9. I think you are the most humorous man that I ______________________. 10. My first novel was rejected by six publishers. _______________________ I had written a play. |
