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【简答题】
请根据调查某双子叶草本植物种群密度的过程，回答下列问题：样方法调查时，取样的关键是要做到随机取样，不能掺入主观因素。常用的取样方法有（）和（）。
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举一反三
【单选题】色谱法定量分析时采用内标法的优点是( )。
A.
可以缩短分析时间
B.
消除和减轻拖尾因子
C.
内标物易寻找
D.
消除仪器、操作等影响，优化测定的精密度
E.
优化共存组分的分离效果
查看完整题目与答案
【单选题】What happened to the trendy French radio journalist, Albert Dufort, according to the passage?
A.
He was recognized as a famous reporter after the historical move of immigrants.
B.
He was killed for some unknown reason.
C.
He believed that he was also an immigrant from India.
D.
Tens of thousands of students travel south to greet him.
查看完整题目与答案
【单选题】According to the first paragraph, what happened to the waters off southern Greenland and Iceland in the last 30 years?
A.
The waters are salty.
B.
The waters are not very salty.
C.
The salinity is decreasing.
D.
The sea water is becoming less and less.
查看完整题目与答案
【判断题】采用自动变速器能提高汽车在坏路的通过性。()
A.
正确
B.
错误
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【简答题】What happened to the New York Knicks in the 1980s?
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【简答题】病理性萎缩的常见类型有: 、 、 、 。
查看完整题目与答案
【单选题】Finally, what happened to the song 'Good Morning to All' after the addition of the second verse?
A.
It was even more popular than before．
B.
I t was no longer sung by the children in kindergarten．
C.
The composers，Mildred and Patty, gave up their rights to own the song．
D.
It was gradually replaced by the addition, having a new name 'Happy Birthday to You'．
查看完整题目与答案
【单选题】具有选频特性的放大电路是()
A.
功率放大器
B.
反相比例运放
C.
场效应管放大器
D.
调谐放大器
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【多选题】土壤扬尘指直接来源于______________等裸露地面的颗粒物。
A.
农田
B.
滩涂
C.
干涸的河谷
D.
未硬化或绿化的空地
查看完整题目与答案
【单选题】What happened to the export manufacturers according to the news on December 1st?
A.
The exports fell by 2.2% in November, quite a shock to them.
B.
They suffered the first fall in exports for seven years.
C.
Their fortunes underwent a steep fall attesting to some evidence.
D.
Their retail price experienced a slight drop but still an impressive figure.
查看完整题目与答案
相关题目：
【单选题】色谱法定量分析时采用内标法的优点是( )。
A.
可以缩短分析时间
B.
消除和减轻拖尾因子
C.
内标物易寻找
D.
消除仪器、操作等影响，优化测定的精密度
E.
优化共存组分的分离效果
查看完整题目与答案
【单选题】What happened to the trendy French radio journalist, Albert Dufort, according to the passage?
A.
He was recognized as a famous reporter after the historical move of immigrants.
B.
He was killed for some unknown reason.
C.
He believed that he was also an immigrant from India.
D.
Tens of thousands of students travel south to greet him.
查看完整题目与答案
【单选题】According to the first paragraph, what happened to the waters off southern Greenland and Iceland in the last 30 years?
A.
The waters are salty.
B.
The waters are not very salty.
C.
The salinity is decreasing.
D.
The sea water is becoming less and less.
查看完整题目与答案
【判断题】采用自动变速器能提高汽车在坏路的通过性。()
A.
正确
B.
错误
查看完整题目与答案
【简答题】What happened to the New York Knicks in the 1980s?
查看完整题目与答案
【简答题】病理性萎缩的常见类型有: 、 、 、 。
查看完整题目与答案
【单选题】Finally, what happened to the song 'Good Morning to All' after the addition of the second verse?
A.
It was even more popular than before．
B.
I t was no longer sung by the children in kindergarten．
C.
The composers，Mildred and Patty, gave up their rights to own the song．
D.
It was gradually replaced by the addition, having a new name 'Happy Birthday to You'．
查看完整题目与答案
【单选题】具有选频特性的放大电路是()
A.
功率放大器
B.
反相比例运放
C.
场效应管放大器
D.
调谐放大器
查看完整题目与答案
【多选题】土壤扬尘指直接来源于______________等裸露地面的颗粒物。
A.
农田
B.
滩涂
C.
干涸的河谷
D.
未硬化或绿化的空地
查看完整题目与答案
【单选题】What happened to the export manufacturers according to the news on December 1st?
A.
The exports fell by 2.2% in November, quite a shock to them.
B.
They suffered the first fall in exports for seven years.
C.
Their fortunes underwent a steep fall attesting to some evidence.
D.
Their retail price experienced a slight drop but still an impressive figure.
查看完整题目与答案