石棉可引起（）。
A.胸膜间皮瘤
B.膀胱癌
C.肾癌
D.皮肤癌
E.肝血管肉瘤
参考答案：A
词语运用。
1. December is the t _____ of the year.
2. Rachel runs fast. She always _____ (beat) me.
3. Don't play in the street. That's too _____ (danger).
4. I'll go to Shanghai _____ (而不) Beijing.
5. He couldn't _____ (想出) an appropriate answer just at the time.
顶棚装饰的分类，按照承载的能力，可以分为：（）。
A、上人顶棚
B、石膏板顶棚
C、金属板顶棚
D、木质顶棚
E、不上人顶棚
