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【多选题】
(第三章)下列关于丙二醇描述正确的是:
A.
丙二醇兼有甘油的优点,刺激性与毒性均小;能溶解很多有机药物;能与水、乙醇、甘油等任意比例混合。
B.
丙二醇是优于甘油的常用溶剂,还广泛用作萃取剂、防腐剂。
C.
丙二醇可作外用软膏的保湿剂,性质与甘油相近,作保湿剂使用浓度在15%以下。
D.
丙二醇性质稳定,不易燃易爆,可以与氧化剂共同储存。
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参考答案：
举一反三
【单选题】____ is a phenomenon that in some speech communities two languages exist side by side with each having a different role to play; and language switching occurs when the situation changes.
A.
Bilingualism
B.
Diglossia
C.
Pidgin
D.
Creole
查看完整题目与答案
【单选题】Trust is a phenomenon that_.
A.
results from our experiences with others
B.
comes from our perceptions
C.
originates from the pit of the stomach
D.
does not have the power and intent to hurt others
查看完整题目与答案
【单选题】在骨骼肌细胞兴奋 - 收缩耦联过程中,胞质内的 Ca 2+ 来自( )
A.
横管膜上电压门控 Ca 2+ 通道开放引起的胞外 Ca 2+ 内流
B.
细胞膜上 NMDA 受体通道开放引起的胞外 Ca 2+ 内流
C.
肌质网上的 Ca 2+ 释放通道开放引起的胞内 Ca 2+ 释放
D.
肌质网上的 Ca 2+ 泵的反向转运
E.
线粒体内 Ca 2+ 的释放
查看完整题目与答案
【判断题】Maori Renaissance is a phenomenon that the Maori tradition and culture were better preserved, and the welfare and social status of the Maoris were imprved in New Zealand.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following is a phenomenon that refers to situations in which people feel themselves at risk of being judged by others holding negative images about them?
A.
perceptual set
B.
the stereotype threat
C.
the glass cliff
D.
role approach
查看完整题目与答案
【单选题】4变频器调参时的下降时间是指( )。
A.
电机空载运行时间
B.
电机停止运行所用时间
C.
电机启动所用时间
D.
电机总运行时间
查看完整题目与答案
【单选题】在骨骼肌细胞兴奋-收缩耦联过程中,胞质内的Ca2+来自
A.
横管膜上电压门控Ca2+通道开放引起的胞外Ca2+内流
B.
细胞膜上NMDA受体通道开放引起的胞外Ca2+内流
C.
肌质网上Ca2+释放通道开放引起的胞内Ca2+释放
D.
肌质网上Ca2+泵的反向转运
E.
线粒体内Ca2+的释放
查看完整题目与答案
【单选题】在骨骼肌细胞兴奋-收缩耦联过程中，胞质内的Ca2+来自（）
A.
横管膜上电压门控Ca2+通道开放引起的胞外Ca2+内流
B.
细胞膜上NMDA受体通道开放引起的胞外Ca2+内流
C.
肌质网上的Ca2+释放通道开放引起的胞内Ca2+释放
D.
肌质网上的Ca2+泵的反向转运
查看完整题目与答案
【简答题】is a phenomenon that air temperature may increase with altitude.
查看完整题目与答案
【单选题】–I don’t suppose he could have done well in the exam last week, _____? --______, he almost failed the exam.
A.
had he; Yes
B.
did he; No
C.
do I ; Yes
D.
could he; No
查看完整题目与答案
相关题目：
【单选题】____ is a phenomenon that in some speech communities two languages exist side by side with each having a different role to play; and language switching occurs when the situation changes.
A.
Bilingualism
B.
Diglossia
C.
Pidgin
D.
Creole
查看完整题目与答案
【单选题】Trust is a phenomenon that_.
A.
results from our experiences with others
B.
comes from our perceptions
C.
originates from the pit of the stomach
D.
does not have the power and intent to hurt others
查看完整题目与答案
【单选题】在骨骼肌细胞兴奋 - 收缩耦联过程中,胞质内的 Ca 2+ 来自( )
A.
横管膜上电压门控 Ca 2+ 通道开放引起的胞外 Ca 2+ 内流
B.
细胞膜上 NMDA 受体通道开放引起的胞外 Ca 2+ 内流
C.
肌质网上的 Ca 2+ 释放通道开放引起的胞内 Ca 2+ 释放
D.
肌质网上的 Ca 2+ 泵的反向转运
E.
线粒体内 Ca 2+ 的释放
查看完整题目与答案
【判断题】Maori Renaissance is a phenomenon that the Maori tradition and culture were better preserved, and the welfare and social status of the Maoris were imprved in New Zealand.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following is a phenomenon that refers to situations in which people feel themselves at risk of being judged by others holding negative images about them?
A.
perceptual set
B.
the stereotype threat
C.
the glass cliff
D.
role approach
查看完整题目与答案
【单选题】4变频器调参时的下降时间是指( )。
A.
电机空载运行时间
B.
电机停止运行所用时间
C.
电机启动所用时间
D.
电机总运行时间
查看完整题目与答案
【单选题】在骨骼肌细胞兴奋-收缩耦联过程中,胞质内的Ca2+来自
A.
横管膜上电压门控Ca2+通道开放引起的胞外Ca2+内流
B.
细胞膜上NMDA受体通道开放引起的胞外Ca2+内流
C.
肌质网上Ca2+释放通道开放引起的胞内Ca2+释放
D.
肌质网上Ca2+泵的反向转运
E.
线粒体内Ca2+的释放
查看完整题目与答案
【单选题】在骨骼肌细胞兴奋-收缩耦联过程中，胞质内的Ca2+来自（）
A.
横管膜上电压门控Ca2+通道开放引起的胞外Ca2+内流
B.
细胞膜上NMDA受体通道开放引起的胞外Ca2+内流
C.
肌质网上的Ca2+释放通道开放引起的胞内Ca2+释放
D.
肌质网上的Ca2+泵的反向转运
查看完整题目与答案
【简答题】is a phenomenon that air temperature may increase with altitude.
查看完整题目与答案
【单选题】–I don’t suppose he could have done well in the exam last week, _____? --______, he almost failed the exam.
A.
had he; Yes
B.
did he; No
C.
do I ; Yes
D.
could he; No
查看完整题目与答案
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