属于名贵硬木的品种包括（）
A.桦木
B.黄花梨
C.紫檀
D.酸枝木
E.鸡翅木
参考答案：B, C, D, E
肋软骨钙化最早开始于第几肋骨（）
A.1
B.2
C.3
D.11
E.12
---Do you have any problems if you __________ this job?
---Well, I’m thinking about the working day.
A．offer
B．will offer
C．are offered
D．will be offered
