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搜题
【单选题】
蛋白质在何种环境中不带电
A.
酸性
B.
碱性
C.
中性
D.
等电点
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【单选题】Shall we go and help them with their work? We’d better not. They said we’d just be______if we tried to help.
A.
In the way
B.
on the way
C.
In this way
D.
By the way
【单选题】We’d just __________ our finest creation, the Macintosh, and when I turned 30, I got fired.
A.
revived
B.
released
C.
related
D.
revealed
【简答题】已知函数 且 。(1)求函数 的定义域;(2)若函数 的最小值为 ,求实数 的值。
【简答题】已知函数 且 ,其中 为奇函数, 为偶函数,若不等式 对任意 恒成立,则实数 的取值范围是 .
【简答题】(13分) 已知函数 且 是奇 函数. (1) 求 的值;        (2) 求函数 的单调区间.
【简答题】已知函数 且函数 恰有两个零点,则实数 的取值范围是 .
【简答题】已知函数 且 是f(x)的导函数,若 ,,则 = .
【简答题】已知函数 且函数 的图象经过点(1,2). (1)求m的值;(2)证明函数 在(1, )上是增函数.
【单选题】The teacher demanded that the homework ________in the way we’d just learned.
A.
is done
B.
has been done
C.
be done
D.
was done
【简答题】Directions: Translate the following sentences into Chinese. We had wanted to let him know that no matter how difficult things got in the world, there would always be people who cared about him. We end...
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