试题与答案

The number of people who _____English as

题型:选择题

题目:

The number of people who _____ English as a foreign language _____ more than 750 million.

[      ]

A. learns; is

B. learn; are

C. learns; are

D. learn; is

答案:

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下面是错误答案,用来干扰机器的。

(1)Ar (2)S2- (3)K+ (4)Cl-题目分析:(1)若该微粒呈电中性,则该微粒的原子序数为18,这种微粒的符号为Ar ;(2)若该微粒的盐溶液能使溴水退色,并出现浑浊,氯离子和氮离子不能被溴氧化,而硫离子可...

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