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H、C、N、O、都属于自然界中常见非金属元素。 （1）O、C、N三种元素的第一电离能由小到大顺序是 ；NH 4 ＋ 中氮原子轨道的杂化类型为________。 （2）CO、N 2 的结构可表示为： 两者的键能数据：（单位kJ/mol） A—B A=B CO 357.7 798.9 1071.9 N 2 154.8 418.4 941.7 结合数据说明CO比N 2 活泼的原因 。 （3）乙二胺(H 2 N-CH 2 -CH 2 -NH 2 )和三甲胺[N(CH 3 ) 3 ]均属于胺，但乙二胺比三甲胺的沸点高的多，原因是 。 （4）C、N元素形成的新材料具有如图所示结构，该晶体硬度将超过目前世界上最硬的金刚石，成为首屈一指的超硬新材料。 该物质的化学式为： 。
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A.
随机数法
B.
抽签法
C.
计算机抽取
D.
判断抽取
E.
摇号机法
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【单选题】Which of the following is a dynamic trend that is affecting the current global business strategies?
A.
The trend toward buying American cars in Europe.
B.
The trend toward the acceptance of the free market system among developing countries.
C.
The trend toward using English as the global language.
D.
The trend toward establishing a world currency.
查看完整题目与答案
【单选题】Which of the following is a dynamic trend that is affecting the current global business strategies?
A.
The trend toward the acceptance of the free market system among developing countries.
B.
The trend toward using English as the global language
C.
The trend toward worldwide instant communication
查看完整题目与答案
【单选题】简单随机抽样的实施方法有( )
A.
随机数法
B.
抽签法
C.
计算器抽取
D.
D、以上都对
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【单选题】慢性肾功能衰竭不全期不会出现
A.
内生性肌酐清除率下降至正常值的20-25%
B.
代谢性酸中毒
C.
中度氮质血症
D.
多尿、夜尿
E.
乏力和轻度贫血
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【单选题】What is most noticeable about the current trend in high school education?
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Some large schools have split up into smaller ones.
B.
A great variety of schools have sprung up in urban and suburban areas.
C.
Many schools compete for the Bill and Melinda Gates Foundation funds.
D.
Students have to meet higher academic standards.
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【单选题】What is the current trend in higher education discussed in the passage?
A.
Institutions worldwide are hiring administrators from the U. S.
B.
A lot of political activists are being recruited as administrators.
C.
American universities are enrolling more international students.
D.
University presidents are paying more attention to funding-raising.
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【单选题】What can ordinary city dwellers do if the current outdoor travel trend continues?
A.
They can do nothing but give up their outdoor travel.
B.
They would feel angry and protest against the ill-trend.
C.
The government and the industry may change their attitude.
D.
Fewer and fewer urban people will make their seasonal outdoor travel.
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【单选题】护士最重要的职责是
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开展健康教育
B.
参与医疗诊断
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做好病人生活护理
D.
制定并实施护理计划
E.
做好内科专科护理
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【单选题】下列选项中，能缓解Ca2+在小肠吸收的是：
A.
葡萄糖
B.
植酸
C.
草酸盐
D.
磷酸盐
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相关题目：
【多选题】简单随机抽样的实施方法有( )。
A.
随机数法
B.
抽签法
C.
计算机抽取
D.
判断抽取
E.
摇号机法
查看完整题目与答案
【单选题】Which of the following is a dynamic trend that is affecting the current global business strategies?
A.
The trend toward buying American cars in Europe.
B.
The trend toward the acceptance of the free market system among developing countries.
C.
The trend toward using English as the global language.
D.
The trend toward establishing a world currency.
查看完整题目与答案
【单选题】Which of the following is a dynamic trend that is affecting the current global business strategies?
A.
The trend toward the acceptance of the free market system among developing countries.
B.
The trend toward using English as the global language
C.
The trend toward worldwide instant communication
查看完整题目与答案
【单选题】简单随机抽样的实施方法有( )
A.
随机数法
B.
抽签法
C.
计算器抽取
D.
D、以上都对
查看完整题目与答案
【单选题】慢性肾功能衰竭不全期不会出现
A.
内生性肌酐清除率下降至正常值的20-25%
B.
代谢性酸中毒
C.
中度氮质血症
D.
多尿、夜尿
E.
乏力和轻度贫血
查看完整题目与答案
【单选题】What is most noticeable about the current trend in high school education?
A.
Some large schools have split up into smaller ones.
B.
A great variety of schools have sprung up in urban and suburban areas.
C.
Many schools compete for the Bill and Melinda Gates Foundation funds.
D.
Students have to meet higher academic standards.
查看完整题目与答案
【单选题】What is the current trend in higher education discussed in the passage?
A.
Institutions worldwide are hiring administrators from the U. S.
B.
A lot of political activists are being recruited as administrators.
C.
American universities are enrolling more international students.
D.
University presidents are paying more attention to funding-raising.
查看完整题目与答案
【单选题】What can ordinary city dwellers do if the current outdoor travel trend continues?
A.
They can do nothing but give up their outdoor travel.
B.
They would feel angry and protest against the ill-trend.
C.
The government and the industry may change their attitude.
D.
Fewer and fewer urban people will make their seasonal outdoor travel.
查看完整题目与答案
【单选题】护士最重要的职责是
A.
开展健康教育
B.
参与医疗诊断
C.
做好病人生活护理
D.
制定并实施护理计划
E.
做好内科专科护理
查看完整题目与答案
【单选题】下列选项中，能缓解Ca2+在小肠吸收的是：
A.
葡萄糖
B.
植酸
C.
草酸盐
D.
磷酸盐
查看完整题目与答案