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问题 单项选择题

对两段水平距离丈量的结果为：D1=100m±0.020，D2=200m±0.020m，则两段丈量距离的精度比较高的是（）。

A．K1

B．K2

C．无法比较

答案

参考答案：B

改错题

短文改错 （共10小题，每题1分，满分10分）

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏词符号（∧ ），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线（__），并在该词下面写出修改后的词。

注意：1.每处错误及修改均仅限一词;

2.只允许修改10处，多者（从第11处起）不计分。

Walter's goal in life was become a successfully doctor. He knew he had to finish high school first, so he puts his heart into his studies — in particular, biology, chemistry, or maths. Because he worked hard at these subjects, Walter became good at it. However, Walter forgot what he needed to master some other subjects besides those he had been chosen. As a result, Walter failed both English and Latin in the end of the second school year. But he had to repeat these subjects and he was almost unable to graduate like planned. Walter learned a good lesson.
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多项选择题

关于保险合同的变更，下列说法正确的有（）。

A.保险合同的变更必须由投保人和保险人协商同意

B.以死亡为给付保险金条件的人身保险合同的变更，应征得被保险人同意

C.变更保险合同应由保险人在保险单或其他保险凭证上批准或附贴批单

D.可由投保人和保险人订立变更的书面协议

E.保险人不愿继续承保，可以单方变更合同，无须投保人同意
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