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【单选题】
We regret that the customers at our end _____ the quality and material of your goods.A.
are satisfied with
B.
are satisfactory to
C.
are dissatisfactory to
D.
are dissatisfied with
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反馈参考答案：
举一反三
【判断题】Equity securities are represented by a
certificate, such as a stock certificate, and are commonly traded in the stock
market.
A.
正确
B.
错误
【单选题】有关尿液分析仪质控的表达,下列说法中错误的是()
A.
质控物成分应稳定
B.
选择质控物时,最好使用多项复合控制品
C.
在一天内最好使用统一份质控物
D.
使用不同批号的试剂带前均需做质控
E.
使用不同批号的试剂带前不需做质控
【简答题】有下列命题： ①若 存在导函数，则 ②若函数 ③若函数 ，则 ④若三次函数 则 是“ 有极值点”的充要条件. 其中真命题的序号是 .
【单选题】Equity securities are:
A.
loans taken out by the corporation
B.
only owned by shareholders in public corporations
C.
only owned by shareholders in close corporations
D.
usually in the form of shares of stock for a corporation
E.
always regulated by the federal government
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