搜题请搜索小程序“爱下问搜题”
问题 单项选择题

两个同类型的电动机对某一点的噪声影响分别为65dB(A)和62dB(A)，请问两个电动机叠加影响的结果是：

A．63.5dB(A)

B．127dB(A)

C．66.8dB(A)

D．66.5dB(A)

答案

参考答案：C

单项选择题 A1/A2型题

为延缓慢性肾衰竭的进展，每天给予的热量至少为（）。

A.105.6kJ／kg

B.115.6kJ／kg

C.125.6kJ／kg

D.135.6kJ／kg

E.145.6kJ／kg
查看答案
写作题

书面表达。

     你和李明参加了一次野外生存训练，以下5幅图画表现了野外训练的过程，请根据图示写一篇英文日

记。

                                     

     注意：

     1. 词数100左右；

     2. 日记的开头与结尾已为你写好。

     3. 生词：指南针-compass 手电筒-flashlight 急救包-first-aid kit 宿营地-campsite

Saturday, July 4, 2008          Cloudy

     Li Ming and I took part in a wilderness survival program yesterday, and it has been one of the most

unforgettable experiences since high school. _______________________________________________

___________________________________________________________________________________

The two of us spent the night in the forest.

     We learned to use knowledge gained in classroom training to solve problems. It was quite an experience

for us both, which I'll never forget for the rest of my life.

查看答案