生产经营单位的安全生产管理人员应怎样管理本单位的安全工作?
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John ____ at the head of the table with his wife next to him. Which of the following can’t replace the underlined word.
A. seated
B. seated himself
C. was seatedD.took a seat
2019年是新中国成立()。
A. 60周年
B. 70周年
C. 80周年
D. 90周年
“太行新愚公”指的是()
A. 焦裕禄
B. 李保国
C. 杨善洲
D. 郭明义
I am not sure how long they _____.
A. have married
B. have been married
C. have got married
D. married