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【单选题】
下列属于吗啡半合成衍生物的是A.
右美沙芬
B.
喷他佐
C.
可待因
D.
哌替啶
E.
美沙酮
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【简答题】我国的国内航空货运单有 ( ) 联,包括 ( ) 联正本、 ( ) 联副本。
【单选题】Dr. Jones ordered ______ for the laboratory.
A.
two pieces of equipments
B.
two equipments
C.
two pieces of equipment
D.
two piece equipments
【单选题】About______of these rooms______empty.
A.
two third, are
B.
two thirds, are
C.
two thirds, is
D.
two third, is
【简答题】阅读材料,完成下列要求。( 10 分) 太平洋山脊国家步道( PCT ),沿着美国西部的喀斯喀特山脉和内华达山脉最高的山脊延伸,北起美加边境,南至美墨边境,沿途经过 25 个国家森林公园和 7 个国家公园。美国制定了 “ 无痕山林 ” 法,规定徒步运动应沿着现有的步道行走,什么也不带来、什么也不带走,装满你的相机存储卡而不是你的背包。 简述美国建立国家风景步道并颁 布 “无痕山林”法 的生态意义。...
【单选题】The_____ should be taken good care of. They are too young. [ ]
A.
two-year-old
B.
two -year-olds
C.
two -years-old
D.
two -year-old child
【单选题】______ number of the students in their school is about two thousand, ______ of them are boys.
A.
A; two thirds
B.
The; two third
C.
The; two thirds
D.
A; two third
【简答题】数码摄影系统是由（）、（）、（）三大部分组成的。
【单选题】Look! There are______grazing over there.
A.
two catties
B.
two head of catties
C.
two cattle
D.
two heads of cattle
【单选题】—Something to drink? —Yes, ________.
A.
two glass of milk
B.
two glass of milks
C.
two glasses of milks
D.
two glasses of milk
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