题目内容

李白绝句的特点：含蓄明快，自然天成。

A. 对
B. 错

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I'm not very good at golf-I only took it_____recently

A. on
B. at
C. up
D. in

PabloPicassowastoo old to be called "the youngest artist".

A. 对
B. 错

U.S. and Mexican security experts said Cienfuegos was generally regarded___ an honest professional.

某种粘滞流体通过管半径为 r 的管道时流阻为 R，如果将管半径增加一倍，其流阻为：（）

A. R/2
B. R/8
C. R/16
D. 16R