企业本期发生的构成产品成本费用，包括直接人工、直接材料、制造费用，均为直接费用。(

一般自然冷却的变压器顶层油温不宜超过（）℃。

A.65

B.75

C.85

D.105

选词填空。

沸腾    奔腾    欢腾

1．浪潮犹如千万匹战马齐头并进，浩浩荡荡地（　　）过来。

2．水天相接的地方出现了一条白线，急切等待观潮的人群立刻（　　）起来。

3．2008年奥运会的承办权交给北京的喜讯传来，北京城内一片（　　）。

陆续    继续

4．忙碌了一天的鹭鸟，在夜幕降临的时候，（　　）飞回自己的巢穴。

5．我们把手一拍，便看见一只大鸟飞了起来。我们（　　）拍掌，树上就变得热闹了。

I went to a group activity, “Sensitivity Sunday”, which was to make us more aware of the problems were faced by disabled people. We were asked to “adopt ﹀disability” for several hours on one Sunday. Some members, as me, chose the wheelchair. Other wore sound-blocking earplugs or blindfolds. Just sitting in the wheelchair is a learning experience. I had never considered before how awkwardly it would be to use one. As soon as I sat down, my weight made the chair begin to roll with its wheels were not locked. Then I wondered how to put my feet. It took me quite a while to get the metal footrest into place. My wheelchair experiment was soon finished. It made a deep expression on me.

捣固车作业前，一般应预设定捣固镐头夹持时间控制开关，数字之间间隔（）。

根据地震波的传播情况把地球内部划分为（）、（）、（）三个圈层。各圈层间有一个明显的分界面，地壳与地幔之间的分界面叫（），地幔与地核之间的分界面叫（）。