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单项选择题

T细胞的免疫功能是( )。 A.
细胞免疫与辅助B细胞产生体液免疫 B.
体液免疫 C.
细胞免疫和体液免疫 D.
细胞免疫

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未知题型
Students have many resources on campus ,TV set is one of them. But many resources are misused or not fully useD.Take TV set for example, because it is in the campus center, it has always caused congestion and wasting students’timE.Write a proposal to the director of the campus on this problem.
In the first part of your letter you should present your thesis statement, and in the second part you should support the thesis statement with appropriate details. In the last part you should bring what you have written to a natural conclusion with a summary.
Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks. Write your composition on ANSWER SHEET FOUR.
单项选择题
最小二乘拟合是通过使各实验（或观测）数据与拟合曲线的偏差的平方和最小，来寻找实验数据的最佳函数匹配的方法。
A、正确
B、错误
单项选择题
Which of the following descriptions about zongzi is right? A.
There is no difference between zongzi and jiaozi. B.
There is no filling in zongzi. C.
Zongzi is not only delicious but also good for health. D.
We can only have zongzi on the Dragon Boat Festival.
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