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把凸透镜正对着太阳光,可在距凸透镜15cm处得到一个最小最亮的光斑
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Standing in line for the latest iPhone at the Apple store
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已知数列{an}满足a1=1,an=2an-1+1,则an=______.
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ADADADADAD
用在,句中,单词
12-09
把凸透镜正对着太阳光,可在距凸透镜15cm处得到一个最小最亮的光斑
12-09
12-09
12-09
12-09
Standing in line for the latest iPhone at the Apple store
12-09
12-09
12-09
已知数列{an}满足a1=1,an=2an-1+1,则an=______.
12-09
12-09
12-09
12-09
题目Have you finished the work__?A. justB. alreadyC. stillD. yet可圈可点用户2021-02-03 05:20优质解答解析:答案:D表示“已经”由两个单词,a
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题目
Have you finished the work__?
A. just
B. already
C. still
D. yet
可圈可点用户
2021-02-03 05:20
优质解答
解析:
答案:D
表示“已经”由两个单词,already和yet,前者用在肯定句中,后者用在否定句或疑问句中。
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