加油站推行服务差异化，能够满足顾客的（）需求。
A、专业化
B、个性化
C、共性
D、以上3项
参考答案：B
The students _______ their homework carefully when the teacher walked into the classroom quietly.
A．do
B．did
C．are doing
D．were doing
双侧瞳孔散大见于()
A．有机磷中毒
B．脑疝
C．脑出血
D．阿托品中毒
E．氰化物中毒
