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【单选题】
下列不符合双胎双测量特点的是 ( )
A.
双胎之间差4mm之内
B.
双胎之间的差1~2cm之间
C.
双胎中甲胎比乙胎双小6mm,应认为甲胎宫内发育迟缓
D.
双胎双稍小于单胎双
E.
双胎双稍大于单胎双
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【单选题】—President Obama has never been to Beijing, ______ he? — He visited the Great Wall on the afternoon of November 18th,2011.
A.
hasn’t, No
B.
has, Yes
C.
hasn’t, Yes
D.
has, No
【简答题】-----Is this city _______ he visited the other day? ------No, this is the city ________ he was born. A, that ,  ,that   B. the one, where   C. the one,  on which   D. that , where
【单选题】以下哪个取代基是具有给电子诱导效应?
A.
一NO2
B.
一OCH3
C.
一COOH
D.
一CF3
【单选题】he visited the new school, he showed great interest in everything he saw.
A.
It’s the first time
B.
For the first time
C.
The first time
D.
At first
【单选题】— What did he think of the trip to Beijing last month? — He had such a good time ________ he visited the Great Wall.
A.
until
B.
that
C.
where
D.
when
【单选题】What did the man do firstly when he arrived in Paris?
A.
He visited a famous fountain.
B.
He visited some art galleries.
C.
He visited the Eiffel Tower.
D.
He visited a flea market.
【简答题】A.He worked there as a guide. B.He read about it. C.He had just visited it. D.He interviewed the sculptor.
【单选题】以下哪个取代基是具有给电子诱导效应(+I)?
A.
- NO2
B.
-OCH3
C.
-COOH
D.
-CH 3
【简答题】教育学真正成为一门科学,标志性的事件是《 》的出版。
【单选题】测量表层海水盐度应每天什么时间采水样?
A.
00Z
B.
06Z
C.
12Z
D.
18Z
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