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【单选题】
水田中氮素主要是通过 损失的。
A.
硝化作用
B.
氨化作用
C.
反硝化作用
D.
挥发作用
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参考答案：
举一反三
【单选题】When a society achieves allocative efficiency, it
A.
is not achieving production efficiency.
B.
is producing that combination of goods and services that society values most highly.
C.
might or it might not be producing at a point on societyʹs PPF.
D.
is producing a combination of goods and services whose marginal cost exceeds their marginal benefit.
E.
is producing the combination of goods and services for which marginal benefit exceeds marginal cost by as much as possible.
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【单选题】When was the Fraunhofer Society founded? 查看材料
A.
In 1940.
B.
Last year.
C.
After theunification.
D.
In 1949.
查看完整题目与答案
【单选题】When television was first (introduced), the extent to (that) it would (affect) society could not (have been foreseen).
A.
introduced
B.
that
C.
affect
D.
have been foreseen
查看完整题目与答案
【单选题】When we see well, we do not think about our eyes very often. (79) It is only when we cannot see perfectly that we realize how important our eyes are. People who are nearsighted can only see things tha...
A.
only when we can see well
B.
only when we cannot see perfectly
C.
even if we can see dell
D.
only when we realize how important our eyes are
查看完整题目与答案
【多选题】以下关于分群抽样的描述,正确的是
A.
把总体区分为若干群体，再从中抽取一个或几个群体作为样本，进行随机调研的形式
B.
适合在总体数量较大，各群集中性、均匀性较好的情况下使用
C.
多数情况下，样本群需要人为重新组合而成
D.
分群的核心原则是群间差异小、群内差异大
查看完整题目与答案
【多选题】下面属于运输系统的构成是( )
A.
托运人
B.
承运人
C.
运输工具
D.
运输线路
查看完整题目与答案
【单选题】When we see well, we do not think about our eyes very often. (79) It is only when we cannot see perfectly that we realize how important our eyes are. People who are nearsighted can only see things tha...
A.
only when we can see well
B.
only when we cannot see perfectly
C.
even if we can sec well
D.
only when we realize how important our eyes are
查看完整题目与答案
【多选题】属于运输系统的构成是( )
A.
托运人
B.
承运人
C.
运输工具
D.
运输线路
查看完整题目与答案
【单选题】When we see well, we do not think about our eyes very often. (76) It is only when we cannot See perfectly that we realize how important our eyes are. People who are near-sighted can only see things th...
A.
only when we can see well
B.
only when we cannot see perfectly
C.
even if we can see well
D.
only when we realize how important our eyes are
查看完整题目与答案
【单选题】粉末直接压片时,既可作填充剂,又可作粘合剂,还兼有良好崩解作用的辅料是( )
A.
、糊精
B.
、甲基纤维素
C.
、微粉硅胶
D.
、微晶纤维素
查看完整题目与答案
相关题目：
【单选题】When a society achieves allocative efficiency, it
A.
is not achieving production efficiency.
B.
is producing that combination of goods and services that society values most highly.
C.
might or it might not be producing at a point on societyʹs PPF.
D.
is producing a combination of goods and services whose marginal cost exceeds their marginal benefit.
E.
is producing the combination of goods and services for which marginal benefit exceeds marginal cost by as much as possible.
查看完整题目与答案
【单选题】When was the Fraunhofer Society founded? 查看材料
A.
In 1940.
B.
Last year.
C.
After theunification.
D.
In 1949.
查看完整题目与答案
【单选题】When television was first (introduced), the extent to (that) it would (affect) society could not (have been foreseen).
A.
introduced
B.
that
C.
affect
D.
have been foreseen
查看完整题目与答案
【单选题】When we see well, we do not think about our eyes very often. (79) It is only when we cannot see perfectly that we realize how important our eyes are. People who are nearsighted can only see things tha...
A.
only when we can see well
B.
only when we cannot see perfectly
C.
even if we can see dell
D.
only when we realize how important our eyes are
查看完整题目与答案
【多选题】以下关于分群抽样的描述,正确的是
A.
把总体区分为若干群体，再从中抽取一个或几个群体作为样本，进行随机调研的形式
B.
适合在总体数量较大，各群集中性、均匀性较好的情况下使用
C.
多数情况下，样本群需要人为重新组合而成
D.
分群的核心原则是群间差异小、群内差异大
查看完整题目与答案
【多选题】下面属于运输系统的构成是( )
A.
托运人
B.
承运人
C.
运输工具
D.
运输线路
查看完整题目与答案
【单选题】When we see well, we do not think about our eyes very often. (79) It is only when we cannot see perfectly that we realize how important our eyes are. People who are nearsighted can only see things tha...
A.
only when we can see well
B.
only when we cannot see perfectly
C.
even if we can sec well
D.
only when we realize how important our eyes are
查看完整题目与答案
【多选题】属于运输系统的构成是( )
A.
托运人
B.
承运人
C.
运输工具
D.
运输线路
查看完整题目与答案
【单选题】When we see well, we do not think about our eyes very often. (76) It is only when we cannot See perfectly that we realize how important our eyes are. People who are near-sighted can only see things th...
A.
only when we can see well
B.
only when we cannot see perfectly
C.
even if we can see well
D.
only when we realize how important our eyes are
查看完整题目与答案
【单选题】粉末直接压片时,既可作填充剂,又可作粘合剂,还兼有良好崩解作用的辅料是( )
A.
、糊精
B.
、甲基纤维素
C.
、微粉硅胶
D.
、微晶纤维素
查看完整题目与答案
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