问题
单项选择题 A1型题
下列研究中研究者不能人为设置研究因素的是（）
A.动物实验
B.临床试验
C.社区干预实验
D.半试验性研究
E.以上都不是
答案
参考答案：E
搜题请搜索小程序“爱下问搜题”
下列研究中研究者不能人为设置研究因素的是（）
A.动物实验
B.临床试验
C.社区干预实验
D.半试验性研究
E.以上都不是
参考答案：E
| 补全对话。选择恰当的句子完成对话，其中有两项为多余选项。 | |
Liu Tao: 1 Wang Lin: I'm going to Shanghai. Liu Tao: 2 Wang Lin: I'm going to visit Shanghai Expo. Liu Tao: That is wonderful. 3 Wang Lin: Yes, I will. Liu Tao: How will you get there? Wang Lin: 4 Liu Tao: What are you going to visit? Wang Lin: _ _5 What about you? Liu Tao: I'm going to Shanghai Expo, too. Wang Lin: Really? That's great! Maybe we can take the same plane. Liu Tao: Maybe we can stay in the same hotel and sit next to each other. Wang Lin: Ha,maybe. |