表达式(“天津”#“天京”)的值是( )。A．1 B．天津天京 C．. D．.

噪声对人体有哪些影响？

耐火制品的荷重软化点是是指（）。

The promoters of the Springfield music festival estimated a 50 percent increase in ticket sales from last year, but because of bad weather, ticket sales actually decreased by 25 percent from last year’s level. What percent of the projected ticket sales were the actual ticket sales ？（）

A. 45

B. 50

C. 55

D. 65

E. 75

一般而论，下述具体措施对于维持朋友之间的相互联络会有所帮助的是：（）。

A.利用媒介

B.经常走访

C.托人致意

D.定期聚会