问题
单项选择题
坑、井、易滑坡地段或其他可能危及作业人员或他人人身安全的野外地质勘探作业应设置（）。
A.护栏
B.障碍物
C.安全标志
D.警戒线
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
坑、井、易滑坡地段或其他可能危及作业人员或他人人身安全的野外地质勘探作业应设置（）。
A.护栏
B.障碍物
C.安全标志
D.警戒线
参考答案：C
| 阅读理解。 | |||||||||||||||
Survey about What Students Do in the Summer Vacation
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| 1. Most students _____ in the summer vacation. | |||||||||||||||
| A. learn some subjects B. play computer games C. do chores at home | |||||||||||||||
| 2. According to the survey, what the students like to do best is _____. | |||||||||||||||
| A. Study in the training school B. get together with their classmates C. do chores at home |