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下面是对太阳光发生色散现象的探究实验． 实验一： 用平面镜引入一束日光，通过狭缝照到三棱镜上，如图所示．调整棱镜的方位，在白色光屏上可以看到白光通过棱镜折射后得到的彩色光带．把白纸放在棱镜前，让学生看到照到棱镜上的光是白光，由此得知白光通过棱镜折射后分解成各种颜色的色光． 实验二：在狭缝前放置红色玻璃（或蓝色玻璃），用白纸显示出照在三棱镜上的光是红光（或蓝光）；通过三棱镜后，光改变了传播方向，但不分解，仍然是红光（或蓝光）． 问题： （1）你认为太阳光通过棱镜后在光屏上得到了七色光是因为（_____） A、太阳光中含有七色光，由于光的折射，通过棱镜后各色光分散开了 B．棱镜中含有七色光，有太阳光通过色光分散出来 （2）你得到（1）中答案的根据是什么？ （3）由实验现象可以看出各色光通过棱镜时，哪种光的偏折最大？哪种光的偏折最小？太阳光发生色散的原因是什么？ （4）实验中，为什么要让太阳光先通过一个狭缝再射到棱镜上？
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【简答题】科学成本管理的核心是( )
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【单选题】It's suggested that a play at the English Evening on New Year's Eve.
A.
should put on
B.
must be put on
C.
be put on
D.
would be put on
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【单选题】Lloyd Memorial High School's experimentation with the idea of single-sex class ______.
A.
was carried out in all classes of all grades
B.
primarily, aimed to improve the boys' reading
C.
was regarded to be a success both by teachers and parents
D.
were confronted with objection from the students
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【单选题】When is the Spring Festival?
A.
It's on the first day of a year on the lunar calendar.
B.
It's on the first day of December on the lunar calendar.
C.
It's on the Lunar New Year's Eve.
D.
It's on the first day of a year on the solar calendar.
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【单选题】双胍类降血糖药物的作用机制是:( )
A.
刺激胰岛素β细胞释放胰岛素
B.
降低血清糖原水平
C.
增加胰岛素与靶组织的结合能力
D.
抑制α-葡萄糖苷酶
E.
促进脂肪组织摄取葡萄糖和抑制肠道葡萄糖的吸收
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【单选题】Monday's class was ___________ because the weather was too bad.
A.
repeated
B.
treated
C.
canceled
D.
scanned
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【单选题】On January 1st, people usually make a New Year's ________ such as quitting smoking or losing weight, but it's never an easy job.
A.
resolve
B.
resolution
C.
decision
D.
determination
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【简答题】根据短文内容和首字母提示完成下列单词。 J 1 1st is New Year's Day. Women's Day is on Match e 2 The first of M 3 is May Day China's Youth(青年)Day comes after it It's on May f 4 .Children's Day is on J 5 1st J 6 1st is our ...
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【单选题】成本计划的核心是( )。
A.
全面成本管理
B.
有效管理成本
C.
确定责任目标成本
D.
科学管理成本
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【多选题】磺酰脲类口服降糖药的作用机制是
A.
通过刺激胰岛。细胞释放激素而起作用
B.
通过刺激胰岛β细胞释放胰岛素而起降血糖作用
C.
长期应用磺脲类药物其降血糖作用是胰岛以外的作用
D.
磺酰脲类能降低血清高血糖素的水平，可能是直接抑制胰腺。细胞分泌或是间接地通过促进释放胰岛素和生长素释放抑制激素而抑制。细胞释放
E.
长期应用此类药物其降血糖作用是胰岛内的作用
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相关题目：
【简答题】科学成本管理的核心是( )
查看完整题目与答案
【单选题】It's suggested that a play at the English Evening on New Year's Eve.
A.
should put on
B.
must be put on
C.
be put on
D.
would be put on
查看完整题目与答案
【单选题】Lloyd Memorial High School's experimentation with the idea of single-sex class ______.
A.
was carried out in all classes of all grades
B.
primarily, aimed to improve the boys' reading
C.
was regarded to be a success both by teachers and parents
D.
were confronted with objection from the students
查看完整题目与答案
【单选题】When is the Spring Festival?
A.
It's on the first day of a year on the lunar calendar.
B.
It's on the first day of December on the lunar calendar.
C.
It's on the Lunar New Year's Eve.
D.
It's on the first day of a year on the solar calendar.
查看完整题目与答案
【单选题】双胍类降血糖药物的作用机制是:( )
A.
刺激胰岛素β细胞释放胰岛素
B.
降低血清糖原水平
C.
增加胰岛素与靶组织的结合能力
D.
抑制α-葡萄糖苷酶
E.
促进脂肪组织摄取葡萄糖和抑制肠道葡萄糖的吸收
查看完整题目与答案
【单选题】Monday's class was ___________ because the weather was too bad.
A.
repeated
B.
treated
C.
canceled
D.
scanned
查看完整题目与答案
【单选题】On January 1st, people usually make a New Year's ________ such as quitting smoking or losing weight, but it's never an easy job.
A.
resolve
B.
resolution
C.
decision
D.
determination
查看完整题目与答案
【简答题】根据短文内容和首字母提示完成下列单词。 J 1 1st is New Year's Day. Women's Day is on Match e 2 The first of M 3 is May Day China's Youth(青年)Day comes after it It's on May f 4 .Children's Day is on J 5 1st J 6 1st is our ...
查看完整题目与答案
【单选题】成本计划的核心是( )。
A.
全面成本管理
B.
有效管理成本
C.
确定责任目标成本
D.
科学管理成本
查看完整题目与答案
【多选题】磺酰脲类口服降糖药的作用机制是
A.
通过刺激胰岛。细胞释放激素而起作用
B.
通过刺激胰岛β细胞释放胰岛素而起降血糖作用
C.
长期应用磺脲类药物其降血糖作用是胰岛以外的作用
D.
磺酰脲类能降低血清高血糖素的水平，可能是直接抑制胰腺。细胞分泌或是间接地通过促进释放胰岛素和生长素释放抑制激素而抑制。细胞释放
E.
长期应用此类药物其降血糖作用是胰岛内的作用
查看完整题目与答案
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