上市暂停也称为“停牌”，最长期限不得超过（）
A.3个月
B.6个月
C.9个月
D.12个月
参考答案：C
不大于6的数可能是6。[ ]
—I don't think maths is so _____ as physics, John.
—I agree with you. It is ____ than physics.[ ]
A. easy; less difficult
B. difficult; less easy
C. difficult; less difficult
D. more difficult; easier
