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问题 选择题

Some people complain that it usually           so long to buy train tickets during the Spring Festival.

A．spares

B．spends

C．takes

D．costs

答案

答案：C

单项选择题

为保证墙体的整体性和传力有效，砖块的排列方式应遵循内外搭接、上下错缝的原则，砖块错缝搭接长度不应小于( )砖长。

A．1/4

B．1/3

C．1/2

D．2/3
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问答题

(A) 条件(1)充分，但条件(2)不充分．
(B) 条件(2)充分，但条件(1)不充分．
(C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
(D) 条件(1)充分，条件(2)也充分．
(E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

All of the tickets for two real estate seminars, F and G, were either purchased or given away, and the ratio of F tickets to G tickets was 2 to 1. Of the total number of F tickets and G tickets, what percentage was purchased
(1) The total number of F tickets and G tickets is 240.
(2) Of the F tickets, exactly 60 percent were purchased, and of the G tickets, exactly 80 percent were purchased.
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