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【单选题】
对旋光度不变的某样品, 若用长度为10 cm, 20 cm的旋光管测其旋光度, 测量值分别为a 1 , a 2 , 则: ( )A.
a 1 =2a 2
B.
2a 1 =a 2
C.
a 1 =a 2
D.
a 1 ≠a 2
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举一反三
【单选题】【3+2天天练 第30天】下列哪一个选项是空缺处的最佳答案。It's an unusual taxi. It isn't very ______.
A.
accustomed
B.
common
C.
usually
D.
used to
【简答题】起动机的传动机构包括( )和(拨叉)两个部分。
【单选题】【3+2天天练 第30天】下列哪一个选项是空缺处的最佳答案。The man wanted to fly to Rockall. ______ to take him there.
A.
He wanted the pilot
B.
He wanted
C.
The pilot he wanted
D.
The pilot the man wanted
【单选题】【3+2天天练 第30天】下列哪一个选项是空缺处的最佳答案。Captain Fawcett has flown passengers to many unusual ______.
A.
parts
B.
pieces
C.
spots
D.
sections
【单选题】【3+2天天练 第30天】下列哪一个选项是空缺处的最佳答案。This is the most surprising thing about it. It is ______ than anything.
A.
most surprising
B.
more surprising
C.
more surprised
D.
most surprised
【单选题】【3+2天天练 第30天】下列哪一个选项是空缺处的最佳答案。The car park was deserted. It was ______.
A.
a desert
B.
empty
C.
abandoned
D.
wasted
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