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问题 解答题

一台磨面机每半小时磨面0.4kg，照这样2台磨面机6.5时磨面多少kg？

答案

0.4×2×2×6.5，

=10.4（kg）．

答：照这样2台磨面机6.5时磨面10.4kg．

单项选择题

An investor currently has a portfolio valued at $700 000. The investor’s objective is long-term growth, but the investor will need $ 30 000 by the end of the year to pay his son’s college tuition and another $10 000 by year-end for his annual vacation. The investor is considering three alternative portfolios.（）

A．portfolio

B．expected return

C．standard deviation of returns

D．

1

2

3

E．

8%

10%

14%

F．

10%

13%

22%
查看答案
单项选择题

确诊咽旁脓肿依据的检查是（）。

A.血常规检查

B.脓肿穿刺抽脓

C.颈部CT检查

D.颈部B超

E.颈侧位X线检查
查看答案