畜禽病害肉尸及其产品无害化处理的方式有()。
A.销毁
B.化制
C.高温处理
D.加压
参考答案:A, B, C
—Could you go to the beach with us this weekend?
—I'm sorry I can't. I ______ study for the history test.[ ]
A. can
B. could
C. may
D. have to
14岁以下儿童注意缺陷多动障碍的患病率()
A.1%~2%
B.3%~5%
C.5%~7%
D.7%~9%
E.9%~11%