发包人将全部施工任务发包给一个施工单位或由多个施工单位组成的施工联合体或施工合作体,这种承包方式称为()。
A.平行承包
B.施工总承包
C.联合承包
D.横向承包
参考答案:B
根据句意及首字母提示写出所缺单词。
1. - Hi, Betty. What are you _____ to?
- I'm looking for my new watch.
2. The s _____ is dangerous to swimmers.
3. I saw the animals in Australia, such as kangaroos and c_____.
4. The car stopped a _____ the road.
5. He told us the accident in d_____ .
用以表示生态系统中不同生物取食关系的金字塔形营养结构叫()
A.生物金字塔
B.生态金字塔