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【多选题】
特异性细胞免疫的特点为()A.
由T淋巴细胞介导
B.
由TI抗原引起
C.
发挥作用慢
D.
需要淋巴因子参与
E.
有迟发型超敏反应和细胞毒效应等形式
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反馈参考答案：
举一反三
【单选题】In describing White as a 'word-artist', the author means that White ______.
A.
was also a cartoonist
B.
was colorful in his descriptions
C.
had artistic background
D.
was a great writer
【简答题】ATP结合盒式转运蛋白（ATP—binding cassette transporters，ABC transporters）
【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.
【判断题】Transporters also called carrier, can only carry special solute and molecules down its concenttation.
A.
正确
B.
错误
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