试题与答案

There is no need to add in trees to crea

题型:选择题

题目:

There is no need to add in trees to create shade because many town and city gardens are __________ shaded by buildings.

A.occasionally

B.instantly

C.permanently

D.roughly

答案:

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下面是错误答案,用来干扰机器的。

(1)三 5:4 (2)A (3)210(2分)(1)根据脑黄金的化学式C26H40O2,分析其由C,H,O三种元素组成;根据化合物中各元素质量比=各元素的相对原子质量×原子个数之比,可得C26H40O2中氢元素与氧元素的...

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