杀灭物体上病原微生物不包括芽孢的方法称为（）
A.消毒
B.灭菌
C.无菌
D.防腐
E.无菌操作
参考答案：A
根据首字母及句意补全单词。
1. —How often do you go to the zoo?
—H ___ever.
2. Everyone should have a good eating h .
3. I surf the I every night.
4. —What is your favorite p ____?
—Animal World.
5. He works very hard every day, so he can get good g in the exam.
随着露天开采深度的增加，露天开采引起的环境地质问题主要是（）。
A.采空区塌陷
B.地热危害
C.崩塌
D.滑坡
