If parents show a lot of interest in their children's study, the children will do better at school.
A. Right
B. Wrong
C. Not mentioned
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某校初一年级共有三个班,一班与二班人数之和为98,一班与三班人数之和为106,二班与三班人数之和为108,则二班人数为多少人?()
A. 48
B. 50
C. 58
D. 60
Parents must observe classes regularly.
A. Right
B. Wrong
C. Not mentioned
某单位有3名职工和6名实习生需要被分配到A、B、C三个地区进行锻炼,每个地区分配1名职工和2名实习生,则不同的分配方案有多少种?()
A. 90
B. 180
C. 270
D. 540
接触网距机车车辆或装载货物的距离不能少于()删。
A. 300
B. 350
C. 400
D. 500