问题
单项选择题
质量通病防治措施中要求，依据《国家电网公司输变电工程质量通病防治工作要求及技术措施》，混凝土后浇带应在其两侧混凝土龄期大于（）后再施工。
A、30d
B、40d
C、50d
D、60d
答案
参考答案：D
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质量通病防治措施中要求，依据《国家电网公司输变电工程质量通病防治工作要求及技术措施》，混凝土后浇带应在其两侧混凝土龄期大于（）后再施工。
A、30d
B、40d
C、50d
D、60d
参考答案：D
| 根据下面提供的对话情景，从下列7个选项中选择正确答案，使对话连贯、完整。请将答案代号写在题后的横线上，其中有两项是多余的。 | |
| A:Today we are going to talk about a great invention. It looks like a human being. 1 B:It's a robot. 2 A:Of course not. The first robot was invented in 1921. B: 3 A:Sure. They can take the place of humans to do some boring work. They can also do a lot of dangerous work instead of humans. B: 4 A:No. Robots can do a lot of work instead of people in many ways, but people wouldn't be replaced by robots. 5 B:We get it.
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| 1. 2. 3. 4. 5. |