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【单选题】
构成延伸产品的标志是（）产品组合。
A.
包装
B.
式样
C.
附加价值
D.
商标
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参考答案：
举一反三
【多选题】网络防火墙的作用是
A.
防止内部信息外池
B.
防止系统感染病毒与非法访问
C.
防止黑客访问
D.
建立内部信息和功能与外部信息和功能之间的屏障
查看完整题目与答案
【多选题】液压油是液压传动系统中的传动介质,而且还对液压装置的机构、零件起着( )作用。
A.
保压
B.
润滑
C.
防锈
D.
冷却
查看完整题目与答案
【简答题】ATP结合盒式转运蛋白（ATP—binding cassette transporters，ABC transporters）
查看完整题目与答案
【单选题】旋转编码器三种测速方法中,适合高速但不适合低速的是( )法;不适合高速的是( )法。
A.
M、T
B.
M/T、T
C.
T、M
D.
M、M/T
查看完整题目与答案
【简答题】画出稳压二极管的电路符号,简单论述稳压二极管的工作条件(电压条件和电流条件)
查看完整题目与答案
【多选题】Why does each cell membrane contain a characteristic set of different transporters?
A.
Transporters are responsible for the movement of most small, watersoluble, organic molecules and a handful of inorganic ions across cell membranes. Each transporter is highly selective, often transferring just one type of solute.
B.
To guide and propel the complex traffic of substances into and out of the cell, and between the cytosol and the different membrane-enclosed organelles, each cell membrane contains a characteristic set of different transporters appropriate to that particular membrane.
C.
For example, the plasma membrane contains transporters that import nutrients such as sugars, amino acids, and nucleotides; the lysosome membrane contains an H + transporter that imports H + to acidify the lysosome interior and other transporters that move digestion products out of the lysosome into the cytosol.
D.
T he inner membrane of mitochondria contains transporters for importing the pyruvate that mitochondria use as fuel for generating ATP, as well as transporters for exporting ATP once it is synthesized.
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【单选题】儿童视力发展最快的时期是在( )
A.
3岁左右
B.
5岁左右
C.
7岁左右
D.
10岁左右
查看完整题目与答案
【判断题】汽车空调制冷装置主要由压缩机 、冷凝器 、贮液干燥器、膨胀阀和蒸发器等部件组成。
A.
正确
B.
错误
查看完整题目与答案
【判断题】Transporters also called carrier, can only carry special solute and molecules down its concenttation.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following statements about membrane transporters is wrong?
A.
Membrane proteins that act by increasing the rate of solute movement across membranes are called transporters or carriers.
B.
Transporters are of two general types. Passive transporters simply facilitate movement down a concentration gradient, increasing the transport rate. This process is called passive transport or facilitated diffusion.
C.
Active transporters (sometimes called pumps) can move substrates across a membrane against a concentration gradient or an electrical potential, a process called passive transport.
D.
Primary active transporters use energy provided directly by a chemical reaction; secondary active transporters couple uphill transport of one substrate with downhill transport of another.
查看完整题目与答案
相关题目：
【多选题】网络防火墙的作用是
A.
防止内部信息外池
B.
防止系统感染病毒与非法访问
C.
防止黑客访问
D.
建立内部信息和功能与外部信息和功能之间的屏障
查看完整题目与答案
【多选题】液压油是液压传动系统中的传动介质,而且还对液压装置的机构、零件起着( )作用。
A.
保压
B.
润滑
C.
防锈
D.
冷却
查看完整题目与答案
【简答题】ATP结合盒式转运蛋白（ATP—binding cassette transporters，ABC transporters）
查看完整题目与答案
【单选题】旋转编码器三种测速方法中,适合高速但不适合低速的是( )法;不适合高速的是( )法。
A.
M、T
B.
M/T、T
C.
T、M
D.
M、M/T
查看完整题目与答案
【简答题】画出稳压二极管的电路符号,简单论述稳压二极管的工作条件(电压条件和电流条件)
查看完整题目与答案
【多选题】Why does each cell membrane contain a characteristic set of different transporters?
A.
Transporters are responsible for the movement of most small, watersoluble, organic molecules and a handful of inorganic ions across cell membranes. Each transporter is highly selective, often transferring just one type of solute.
B.
To guide and propel the complex traffic of substances into and out of the cell, and between the cytosol and the different membrane-enclosed organelles, each cell membrane contains a characteristic set of different transporters appropriate to that particular membrane.
C.
For example, the plasma membrane contains transporters that import nutrients such as sugars, amino acids, and nucleotides; the lysosome membrane contains an H + transporter that imports H + to acidify the lysosome interior and other transporters that move digestion products out of the lysosome into the cytosol.
D.
T he inner membrane of mitochondria contains transporters for importing the pyruvate that mitochondria use as fuel for generating ATP, as well as transporters for exporting ATP once it is synthesized.
查看完整题目与答案
【单选题】儿童视力发展最快的时期是在( )
A.
3岁左右
B.
5岁左右
C.
7岁左右
D.
10岁左右
查看完整题目与答案
【判断题】汽车空调制冷装置主要由压缩机 、冷凝器 、贮液干燥器、膨胀阀和蒸发器等部件组成。
A.
正确
B.
错误
查看完整题目与答案
【判断题】Transporters also called carrier, can only carry special solute and molecules down its concenttation.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following statements about membrane transporters is wrong?
A.
Membrane proteins that act by increasing the rate of solute movement across membranes are called transporters or carriers.
B.
Transporters are of two general types. Passive transporters simply facilitate movement down a concentration gradient, increasing the transport rate. This process is called passive transport or facilitated diffusion.
C.
Active transporters (sometimes called pumps) can move substrates across a membrane against a concentration gradient or an electrical potential, a process called passive transport.
D.
Primary active transporters use energy provided directly by a chemical reaction; secondary active transporters couple uphill transport of one substrate with downhill transport of another.
查看完整题目与答案
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