题目内容：
__________ (Necessary) is the mother of invention. This is remarkably true.参考答案：
答案解析：
单选题：__________ (Necessary) is the mother of invention. This is r
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- 题目类型：单选题
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下图右侧的4个图形中，不是左侧立体物件的投影图的是（ ）。
下图右侧的4个图形中，不是左侧立体物件的投影图的是（ ）。
How many grand slams has Serena Williams won this year?
How many grand slams has Serena Williams won this year?A． 1. B． 2. C． 4. D． 13.
__________, many good opportunities were neglected in my lif
__________, many good opportunities were neglected in my life.A． In the vicinity
回答题错误1：__________
回答题错误1：__________
Speech __________ refers to any distinguishable form of spee
Speech __________ refers to any distinguishable form of speech used by a speaker