以下灾害现象中不属于地震次生灾害的是（）
A.火灾、水灾
B.毒气泄漏、放射性污染
C.房倒屋塌
参考答案：C
人类是由_______进化而来的。
It's really noisy outside. I would appreciate ____ if you raise your voice in order to make yourself _______ in the back.
A．this; hear
B．that; heard
C．it; heard
D．you; hear
