有关妥善处理污染废弃物的是
A. 接触过化疗药品的废安瓿要放置在有特殊标记的密封的防漏、防刺破的容器里
B. 所有的污染物，一次性物品必须焚化处理
C. 非一次性物品要与其他物品分装，标记，高温处理
D. 处理12小时内的接受过化疗病人的分泌物、排泄物，必须穿隔离衣、戴手套
I’m sorry. I ___ go now. My father told me on the phone that my mother was ill.
A. can
B. may
C. have to
D. think
A computer ______ think for itself, it must be told what to do.
A. can’t
B. couldn’t
C. may not
D. might not
At that time, we thought the story_____ not be true.
A. could
B. was able
C. is able
D. must
微信支付 
支付宝支付