在常用量下作用最慢而长的药物：

A. 服毒量过大
B. 洗胃不彻底，毒物未被彻底清除
C. 输液量过多过快
D. 减量过早
E. 甲胺磷在肝脏解毒后毒性增强

A. She can hear them crying very loudly at the zoo.
B. She has heard them panting and was told it was laughter.
C. She has read about it from Darwin.
D. She used to work at a zoo.

A. 正确
B. 错误