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【单选题】
扩大吸收表面积的结构是A.
丰富的血管
B.
中央乳糜管
C.
微绒毛
D.
杯状细胞
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【单选题】Your letter will get attention! They know you’re expecting the answer.
A.
careful
B.
common
C.
instant
D.
general
【单选题】Your letter will get ___ attention; they know you're expecting the answer.
A.
careful
B.
common
C.
instant
D.
general
【简答题】He asked ________ since he had been chairman for seven years. A) not to be re-elected B) to be not re-elected C) not to have been re-elected D) to have not been re-elected
【简答题】在加工轴类工件时,常以工件外圆柱面作为定位基准面,根据外圆表面的完整程度、加工要求和安装方式,可用 、 等作为定位元件。
【单选题】．________ relation between China and Russia has developed steadily since Vladimir Putin was reelected ________ president last May.
A.
The; the
B.
A; the
C.
The; /
D.
A; /
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