The new dictionaries are very careful. T

题型:选择题

问题:

The new dictionaries are very careful. They _____ well and _____ already. [ ]

A. sell, have been sold out

B. sold, had sold out

C. sell, sell out

D. are sold, have been sold out

考点:一般现在时现在完成时的被动语态
题型:选择题

已知⊙O中,弦AB的长等于半径,P为弦AB所对的弧上一动点(不包括点A点B),则∠APB的度数为(  ).

A. 30°               B. 150°           C. 30° 或150°     D. 60°或120°

题型:选择题

座谈会的类型主要有两种类型:一是();二是()。

题型:选择题

焦脱镁叶绿素

题型:选择题

“一丝不苟”中的“丝”的本意是( )。

A.计量单位

B.丝线

C.丝绸

D.发丝

题型:选择题

单一气调

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