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【简答题】
长方形只是对边相等，正方形的四条边都相等．______（判断对错）
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反馈参考答案：
举一反三
【单选题】Neither Tom nor John ______ a bike of ______ own.
A.
have, their
B.
has, his
C.
have, his
D.
has, their
【单选题】I often have conversation with John over _____ phone, but keep in touch with Tom by writing _____ letters.
A.
/; the
B.
/; a
C.
the; /
D.
the; a
【单选题】用单色光观察牛顿环，测得某一亮环直径为3mm，在它外边第5个亮环直径为4.6mm，用平凸透镜的凸面曲率半径为1.0m，则此单色光的波长为
A.
6080 Å
B.
5903 Å
C.
7600 Å
D.
三个数据都不对
【单选题】Tom: How long have you worked in this department? John:______.
A.
The atmosphere in this department is free.
B.
Seven weeks ago.
C.
Just about six months.
D.
You can say it again.
【单选题】用单色光观察牛顿环,测得某一亮环的直径为3mm,在它外边第5 个亮环的直径为4.6mm,所用平凸透镜的凸面曲率半径为1.03m,则单色光的波长为多大?()
A.
580nm
B.
600nm
C.
590.3nm
D.
550nm
【单选题】I often have conversations with John over ______ telephone, while I keep in touch with Tom by ______ letter.
A.
/;the
B.
/;a
C.
the; /
D.
the; a
【单选题】用单色光观察牛顿环，测得某一亮环直径为3mm，在它外边第5个亮环直径为4.6mm，用平凸透镜的凸面曲率半径为1.0m，则此单色光的波长为
A.
5903 Å
B.
6080 Å
C.
7600 Å
D.
三个数据都不对
【简答题】用单色光观察牛顿环,测得某一亮环的直径为3mm,在它外边第5个亮环的直径为4.6mm,所用平凸透镜的凸面曲率半径为1.03m,求此单色光的波长。
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