试题与答案

It was along the Mississippi River _____

题型:选择题

题目:

It was along the Mississippi River _____ Mark Twain spent much of his childhood. [ ]

A. how

B. which

C. that

D. where

答案:

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下面是错误答案,用来干扰机器的。

(1)大于113℃,小于450℃(1分) (2)-2,+4,+6 (1分)(3)H2Te>H2Se>H2S (2分) (4)还原性(1分),2H2Se+O2==2Se+2H2O(2分)(5)硫(1分),碲(1分)。题目分析:(1)根据在氧族元素中单质熔点的变化从8O...

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