问题
单项选择题
火电施工项目中，可以由分包单位单独承建的是：（）。
A.汽机本体
B.高、中压管道
C.主厂房及其基础
D.输煤系统
答案
参考答案：D
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火电施工项目中，可以由分包单位单独承建的是：（）。
A.汽机本体
B.高、中压管道
C.主厂房及其基础
D.输煤系统
参考答案：D
| 完形填空。 | ||||
Camping trip | ||||
| Every year, __1__ Americans __2__ their weekends or holidays camping. "Camping" is living __3__ for a while. It is popular because it doesn't cost __4__. It is also a good way for a family to enjoy themselves together. Many campers sleep on the __5__ inside cloth tents. The tents prevent from (防止) rain and wind. __6__ they do not provide (提供) much comfort, so some people drive a small house on wheels (旅游汽车) to a camping area. These houses on wheels __7__ popular in the USA for a number of years. Most of them have a television, cooking equipment (设备) and sleeping area. They even have special equipment to keep the __8__ cool inside. Some people say it is like __9__ your home with you __10__ the great outdoors. | ||||
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