— Miss Yang, may I take the magazine out of the reading room?
— No, you can't. You _____ read it here. It is the rule.
A:must
B:would
C:may
— No, nothing.
竞赛学科
数学
物理
化学
北大
6
4
2
清华
1
0
若随机从获取北大、清华保送资格的学生中各取一名,则至少1人是参加数学竞赛的概率为( )
标有“220V100W”的甲灯和“220V40W”字样的乙灯(不考虑温度对灯丝电阻的影响),它们的电阻( )
—I can help you.
—Oh, that's great! Thanks so much.
—_____________.