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问题 单项选择题 A1/A2型题

急性羊水过多大多发生于 （）

A.妊娠12～16周

B.妊娠20～24周

C.妊娠26～28周

D.妊娠30～34周

E.妊娠36～38周

答案

参考答案：B

选择题
给下列的单词选择正确的汉语意思。
( ) 1. stomach
( ) 2. elbow
( ) 3. eye
( ) 4. finger
( ) 5. toe		A. 脚趾
B. 胃，肚子
C. 手指
D. 眼睛
E. 胳膊（肘）
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单项选择题

Specific duties are levied （） some physical unit such as dollars per bushel, per kilo, or per metre and ad valorem duties are calculated as a percent of the value of the goods.

A. on the basis of

B. with the basis of

C. on the base of

D. with the base of
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