数控车削走刀路线包括刀具的()和各种刀具的使用顺序。 A.安装方式 B.装夹方式 C

题型:单项选择题

问题:

数控车削走刀路线包括刀具的()和各种刀具的使用顺序。

A.安装方式

B.装夹方式

C.位置精度

D.运动轨迹

考点:数控车工考试高级数控车工高级数控车工题库
题型:单项选择题

如图是两种细胞的结构示意图,据图回答问题:

(1)______ 图所示为动物细胞结构,______ 图所示为植物细胞结构.

(2)动物细胞没有,而植物细胞特有的结构是[A]______、[E]______和[F]______.

(3)用刀切西瓜时,流出来的汁液是______,该汁液主要来自图中的______结构.

题型:单项选择题

货币供应量包括现金和存款两个部分,其中现金是()的负债。

A.政府

B.商业银行

C.政策性银行

D.中央银行

题型:单项选择题

与四肢强健与否关系密切的是( )

A.肾的功能

B.心的功能

C.脾的功能

D.肺的功能

E.肝的功能

题型:单项选择题

阅读理解。

     The bar-tailed godwit (斑尾鹬) has just broken its own record for the world's longest non-stop flight,

including humans in planes, according to a report made by Lund University Press. The bird can fly

non-stop for eight days, while the most impressive man-made airplane can only remain in the sky for 82

hours without a stop.

     The bar-tailed godwit's journey, from Alaska to New Zealand, covers over 6,835 miles. It completes

this trip twice a year, in autumn going to New Zealand, and in spring back to Alaska. The tireless bird

ends the trip without stopping once for food or rest. All other birds can only finish trips that are twice as

short as what the bar-tailed godwit travels.

     One reason for the bar-tailed godwit's success is that it has made the best use of its fuel, which is only 0.41 percent of its body weight over each hour of any given long flight. Hedenstrom, a professor from

Lund University, says, "This figure is extremely low compared with other birds." The bird also has a

special body shape that helps it fly easily. It stores body fat and protein to manage its trips. It also travels

fast, compared to other birds and animals.

     Many questions remain about this bird record holder that never gets lost in the air. Researchers

wonder whether it has an inside compass (指南针) that helps it to know the direction. Please watch how

beautiful bar-tailed godwits look as they come in for a landing, along with other birds.

1. For the flight from Alaska to New Zealand, the bar-tailed godwit _____.

A. doesn't need to stop to eat

B. is afraid of hot weather

C. seems very tired at last

D. should fly less than 7000 metres

2. The main reason why the bar-tailed godwit can break the record is that it ______.

A. eats little food every hour

B. has a special body shape

C. stores much water in its body  

D. has very light body weight

3. The last paragraph tells us that ________.

A. researchers have understood the bird very well

B. the bird has a very good sense of direction

C. there are still many who doubt the bird's ability

D. the bird has an inner compass

4. What is the text mainly about?

A. A bird that breaks the record for the longest non-stop flight.

B. Birds and airplanes that can fly over a long distance.

C. Reasons for the bar-tailed godwit's long-distance flight.

D. An introduction to long-distance flights of birds and humans.

题型:单项选择题

人民政协工作的要求中,指出要围绕()和()两大主题。

A.和平、发展

B.民主、团结

C.发展、和谐

D.改革、法治

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