某柴油机中燃料燃烧放出378000J的热量，用来做有用功的是113000J_爱下问搜题

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问题选择题

某柴油机中燃料燃烧放出378000J的热量，用来做有用功的是113000J，则该柴油机的热机效率约为（　　）

A．100%

B．129.9%

C．29.9%

D．33.5%

答案

答案：C

填空题

选词填空。

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    I went to a trip to Qingdao on the summer holiday. It was the first time for me 1.               . And
it was the 2.               time for me to see the sea.How excited when I saw the sea! There were many
visitors there. Some of them 3.                and some of them 4.               photos when I got there. I
couldn't stop 5.                . "The sea, I love you!" I 6.                there for 3 days. I 7.                some
things for my friends, and I ate a lot of sea food. The food was 8.               . I had a 9.                time
there. It is so 10.               that I want to visit it again.

单项选择题

当正常开机时，PASSIM7K/8K接装机滤咀供料应选择（）位置。

A.自动

B.点动

C.任意

D.手动