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【单选题】
用系统命名法给下列化合物命名，正确的一项是：A.
3-己烷
B.
5-甲基-4-乙基
C.
4-甲基-3-乙基
D.
3-甲基-4-乙基
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反馈参考答案：
举一反三
【简答题】当苯环上有CH3和OH并且定位效果不一致时，新进基团由 定位
【单选题】Research into new technologies provides a
A.
negative externality, and too few resources are devoted to research as a result.
B.
negative externality, and too many resources are devoted to research as a result.
C.
positive externality, and too few resources are devoted to research as a result.
D.
positive externality, and too many resources are devoted to research as a result.
【单选题】--- The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job? ---____ my students have a try?
A.
Shall
B.
Must
C.
Will
D.
May
【简答题】The new trend in artificial intelce research stems from
【单选题】给家兔静脉注射25%葡萄糖10 ml后尿量增加,其原因是
A.
抗利尿激素分泌减少
B.
肾小球滤过率增加
C.
肾血浆晶体渗透压增高
D.
肾小管液溶质浓度增高
E.
肾血流量增多
【单选题】给家兔静脉注射25%葡萄糖10ml后尿量增加,其原因是
A.
抗利尿激素分泌减少
B.
肾小球滤过率增加
C.
肾血浆晶体渗透压增高
D.
肾小管液溶质浓度升高
E.
肾血流量增加
【单选题】请根据短文内容，回答题。 New Research Lights the Way to Super-fast Computers (1) New research published today in the journal Nature Communications, has demonstrated how glass can be manipulated to create a materi...
A.
Expectation of the discovery
B.
The problem of current computers
C.
A new finding
D.
The purpose of the research
E.
Public reaction to the discovery
F.
The use of the new material
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