甲乙相向而行，相遇后继续前行，当甲走完全部路程的70%，乙走了

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问题单项选择题

甲乙相向而行，相遇后继续前行，当甲走完全部路程的70%，乙走了全部路程的2/3时，两人的距离是220米。问该段路程多远（）

A．330米

B．700米

C．600米

D．1200米

答案

参考答案：C

解析：

如图所示

已知CD=220米，设AB长为x，

则CB=30%x，。

根据题意得

(米)。

填空题

单词拼写

据下列句子所给汉语注释,在横线上写出空缺处各单词的正确形式。(每空只写一词)

1. In the 1970s, may people in China (仍然)poor, living a hard life.

2. He was greatly (荣幸)to be invited to give a lecture at the meeting.

3. I like to go outing in autumn, especially in (八月).

4. (幸好),he escaped the bad accident yesterday.

5.Please put the (窗帘)of the two windows down to prevent the sunlight coming in.

6.Sorry,the question you asked me was (超出)me.

7.You will be (惩罚)for your fault in the task.

8.I couldn't understand the (解释)you gave me yesterday.

9.The professor (提到)to at the meeting was from Canada.

10.Everyone is (好奇)about what he has done.

多项选择题

使用净现值（NPV）评价六西格玛项目经济性时，下述哪些说法是正确的（）？

A.净现值<0，六西格玛项目的经济型不好，项目不可行

B.净现值>0，六西格玛项目的经济型不好，项目不可行

C.净现值是指当前企业拥有的现金流

D.净现值的计算与折现率有关