下面特点属于同步带的是?() A.能缓和冲击与振动 B.过载时将引起带在轮上打滑 C

题型:单项选择题

问题:

下面特点属于同步带的是?()

A.能缓和冲击与振动

B.过载时将引起带在轮上打滑

C.传动比准确

D.A和B

考点:航空、航天科学技术空气动力学空气动力学题库
题型:单项选择题

阅读下面短文并回答问题 ,然后将答案写到答题卡相应的位置上(请注意问题后的词数要求) 。

[1] Today ,  millions of people want to learn or improve their English but it is difficult to find the best method. Is it better to study in Britain or America or to study in your own country?

[2]The advantages of going to Britain seem obvious. Firstly, you will be able to listen to the language all the time you are in the country. You will be surrounded completely by the language wherever you go. Another advantage is that you have to speak the language if you are with other people. In Italy, it is always possible, in the class, to speak Italian if you want to and the learning is slower.

[3] On the other hand, ______ staying at home to study. You don't have to make big changes to your life. As well as this, it is also a lot cheaper than going to Britain but it is never possible to achieve the results of living in the UK. If you have a good teacher in Italy ,I think you can learn in a more concentrated way than being in Britain without going to a school.

[4] So, in conclusion ,I think that if you have enough time and enough money,  the best choice is to spend some time in the UK. This is simply not possible for most people, so being here in Italy is the only viable(可行的)option. The most important thing to do in this situation is to     maximise  your opportunities to speak only English in class and to try to use English whenever possible outside the class.

小题1: What is the text mainly about?  (no more than 6 words)

___________________________________________________________________

小题2:Complete the following statement with proper words.

All the people and everything around are related with _______,and you'll have more opportunities

小题3:Fill in the blank in paragraph 3 with proper words. (no more than 5 words)

____________________________________________________________________

小题4: What suggestion does the author give to those who learn English in their own country?(no more than 15 words)

____________________________________________________________________

小题5: What does  the  underlined word “it”(line 2,paragraph3) probably  refer to?(5 words)

____________________________________________________________________

题型:单项选择题

下列不属于自然保护区所具有的重要作用的是:

A.天然基因库

B.天然实验室

C.活的自然博物馆

D.人类休养的好地方

题型:单项选择题

判断心跳停止的基本指标是()、呼吸停止、大动脉搏动消失。

题型:单项选择题

工程勘察单位提出的勘察成果包括( )等内容。

A.勘察实施方案、勘察报告

B.地形地物测量图、勘测标志、地质勘察报告等

C.岩土及水文地质勘察报告

D.地形地物测量图、水文地质勘察报告、岩土勘察报告

题型:单项选择题

工程项目管理企业受建设单位委托,按合同约定可以()。

A.直接承担该工程的勘察、设计、施工业务

B.直接与该工程项目的总承包单位签订合同

C.协助业主与该工程项目的总承包单位签订合同并监督合同的履行

D.分包该工程项目的物资采购业务

更多题库