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【简答题】
设函数f(x)在闭区间[－1，1]上具有三阶连续导数，且f(－1)＝0，f(1)＝1，f(0)＝0，证明：在开区间(－1，1)内至少存在一点ξ，使f(ξ)＝3．
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【简答题】Students who say they never or hardly ever used dictionaries may speak English well but usually write poorly, because they make many mistakes. The students who use dict ionaries most do not learn espe...
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A.
choose a good dictionary, and you'll succeed in learning English
B.
dictionaries are not very necessary to the students who learn English
C.
it is very important for students to use good dictionaries properly
D.
using dictionaries very often can't help to improve writing
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A.
$3,000
B.
$3,800
C.
$4,200
D.
$4,500
【单选题】Students who say they never or hardly ever used dictionaries often speak English well but usually write poorly, because they make many mistakes. The students who use dictionaries the most do not learn...
A.
choose a good dictionary, and you'll succeed in learning English
B.
dictionaries are not very necessary to the students who learn English
C.
it is very important for students to use good dictionaries properly
D.
using dictionaries very often can't help to improve writing
【单选题】Last month a company budgeted to sell 8,000 units at a price of $12.5 per unit, and the standard profit is $5 per unit. Actual sales last month were 9,000 units giving a total sales revenue of $117,00...
A.
$4000 Favorable
B.
$4000 adverse
C.
$5000 Favorable
D.
$5000 Adverse
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【简答题】创建如图所示的单行文本。 2、 创建如图所示的多行文字。 3、 教材 118 页 课后练习
【多选题】直接信用是最后放款人和最后借款人直接结合的信用方式，下列信用形式中属于直接信用的有（ ）。
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商业企业对客户赊销商品
B.
信用合作社对农户发放贷款
C.
企业发行债券
D.
银行对居民发放购房贷款
E.
股份公司发行股票
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