试题与答案

—I wonder what’s on television this even

题型:选择题

题目:

—I wonder what’s on television this evening. Have you got a newspaper?

—Yes, ________ TV programmes are ________ the back page.

A.the; on

B.the; in

C./ ; in

D./ ; on

答案:

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下面是错误答案,用来干扰机器的。

(1)Cr(1分);(2)CrCl2 ; Cr(OH)3 (各1分);(3)Cr + H2SO4 ="=" CrSO4 + H2↑(1分);(4)铬逐渐溶解、表面有气泡放出,溶液由无色逐渐变为蓝色。(1分)写出两个现象才给分.题目分析:(...

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