一般情况下，好的机箱板材厚度至少应在（）以上。
A、0.5毫米
B、1毫米
C、1.5毫米
D、5
参考答案：B
用 in, on, under, behind 填空。
I have a nice and clean room. There is a small desk __1__ the room. My clock is __2__ the desk. The
soccer is __3__ the bed. My backpack is __4__ the door of the room. My pen and eraser are not __5__
the pencil-box. The pencil-box is not __6__ the backpack. It's __7__ the clock.
通过抗炎、抗免疫作用平喘的药物是（）
A．苯佐那酯
B．喷托维林
C．氨茶碱
D．异丙肾上腺素
E．倍氯米松
