注册建筑师注册的有效期为：（） A.1年 B.2年 C.5年 D.10年

结合语境，解释下面加粗的词语。  

（1）人类的智慧与大自然的智慧相比实在是相形见绌。  

相形见绌：                                                                     

（2）宇宙是一个硕大无比的、永恒的生命。 

 硕大无比：                                                                     

（3）在自然看来，人类上下翻飞的这片巨大空间，不过是咫尺之间而已，就如同鲲鹏看待斥鴳一般，只是蓬蒿之间罢了。 

 咫尺：                                                                  

卡环过紧（）

A.义齿松动

B.义齿弹跳

C.黏膜压痛

D.基牙疼痛

E.食物嵌塞

塑性破坏的断口一般有（）。

A.金属光泽

B.纤维状

C.河流花样

Frank Jameson is a portfolio manager with 90 percent of the large-cap diversified mutual fund he controls invested in common stocks. Jameson is concerned the overall market will decline by a significant amount over the next two months due to a slowing of the general economy. Which of the following actions will provide a hedge for the mutual fund()

A. Purchasing call options on the S&P 500. 

B. Writing put options on the S&P 500. 

C. Purchasing put options on the Standard and Poor’s 500 Index (S&P 500).

成批的钢屋架，多数采用（）进行装配。