如图所示的内燃机工作的一个循环中,其四个冲程的顺序应当是 [ ] A.乙、甲、丁

题型:选择题

问题:

如图所示的内燃机工作的一个循环中,其四个冲程的顺序应当是

[ ]

A.乙、甲、丁、丙

B.甲、乙、丙、丁

C.乙、丁、甲、丙

D.甲、丁、乙、丙

考点:内燃机的四个冲程
题型:选择题

阅读理解: 先阅读下列短文,掌握其大意,然后在A B C D四个答案中选出最佳答案。

       Leopards (豹) live in many parts of the world, from Siberia to Africa. They have a very beautiful yellow

skin with large black spots. They live for about 15 years and eat small mammals (哺乳动物) such as zebras,

monkeys, and antelopes (羚羊). They sleep for about 12 hours a day. Leopards are very solitary (独居的)

animals. They spend most of their time alone in trees, where they wait until a small animal passes. They jump on

the animal and then drag it up into the tree, where they eat it.

       Like many animals, leopards are disappearing because people hunt them. They kill them for their beautiful

coats. The Sinai leopard, for example, from Egypt, is now probably extinct (绝种的).

1. How old is a leopard? [ ]

A. Fifty weeks

B. Fifteen months

C. Twelve days

D. Fifteen years

2. Leopards live             . [ ]

A. live in family groups

B. live alone

C. live together

D. live with other animals

3. Leopards spend much time in tree because they want to             .[ ]

A. sleep

B. jump

C. wait and catch small mammals

D. rest

4. Which is not true? [ ]

A. Leopards have beautiful fur

B. Leopards eat animals and plants

C . Leopards sleep 12 hours a day

D. The Sinai leopard probably extinct

5. Why do people hunt leopards?   Because              .[ ]

A. they kill them for their meat

B. they attack people all the time

C. they are dangerous

D. they kill them for their coats

题型:选择题

独立的单相交流母线刷漆时A相刷(),C相刷(),排顺序与三相交流相同。

题型:选择题

在预警管理模块查询某一条预警的历史处理明细需要()操作。

A.点击“预警编号”;

B.点击“预警描述”;

C.点击“信息链接”;

D.点击“规则名称”

题型:选择题

证券公司资产管理业务的种类主要有( )。

A.为单一客户办理定向资产管理业务

B.为多个客户办理集合资产管理业务

C.为单一客户办理集合资产管理业务

D.为客户办理特定目的的专项资产管理业务

题型:选择题

土地勘测定界工作,从准备到外业调绘、内业转绘,都是在工作底图上进行。所以它是外业调查、转绘、面积量算、编制土地勘测定界图的()。

A.基础图件

B.技术方案

C.主要图件

D.主要依据

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