搜题请搜索小程序“爱下问搜题”
问题 口语交际，情景问答题

写出下列谚语的意思。    

1．不怕人穷，就怕志短。

                                                                                              

2．当局者迷，旁观者清。

                                                                                         

答案

1．就是说一个人穷并不可怕，就怕甘于贫穷，没有想要出人头地的想法是不能改变贫穷的状况的。

2．就是当事人局限在已定的事情范围内，眼光狭隘不能正常判断，但外人，指与当事人无瓜葛的

人们站在其他角度分析这件事时能够很好地权衡利弊，不受其他干扰。

听力题

根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限填一词。

Bill and Simon were good friends. One summer they were on h        . They wanted to sail around the Caribbean Sea in their boat for two weeks.

During their trip, they saw many whales. Bill and Simon were very e        because they had wanted to see them very much. Unluckily, w        they were watching them, the whales began to hit the side of the boat.

Suddenly, w        started coming in, and they realized that they were in trouble. They q        jumped into the lifeboat before the sank(沉没), and watched it disappear under the sea.

Luckily, they had enough food and water for about twenty d        . They also had a fishing line and a machine which could change sea water i        drinking water. These two things helped them to survive(存活) during their terrible experience.

For the next fifty days they caught about ten fish a day and a        them. They saw about twenty ships, but although they waved and shouted when the ships were passing, n        saw them. They were becoming weaker and weaker. Then, just as they were beginning to l        hope, a fishing boat saved them.
查看答案
单项选择题

在润滑良好的条件下，为提高蜗杆传动的啮合效率，可采用的方法为（）。

A．减小齿面滑动速度υs

B.减少蜗杆头数Z1

C．增加蜗杆头数Z1

D.增大蜗杆直径系数q
查看答案