党章规定,党的基层委员会、总支委员会、支部委员会每届任期三年至五年。A.正确B....

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【判断题】

党章规定,党的基层委员会、总支委员会、支部委员会每届任期三年至五年。

正确

错误

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【简答题】完形填空（共20小题；每小题1.5分，满分30分） In the past, man didn’t have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be 1 . Today things are 2 ,...

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【判断题】平垫圈的作用是放松作用,弹簧垫圈的作用的保护接触面。

正确

错误

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【单选题】关系模式Sailors(sid,lastname.firtname,age,ratring)其中lastname允许为空. 下面哪个语句能够查找出lastname属性值不为空的水手信息.

SELECT * FROM SAILORS WHERE LASTNAME<>'NULL'

SELECT * FROM SAILORS WHERE LASTNAME<>NULL

SELECT * FROM SAILORS WHERE LASTNAME IS not NULL

SELECT * FROM SAILORS WHERE LASTNAME not LIKE 'NULL'

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【单选题】垫圈的作用是：

为螺母提供承载区域

防松

保护被联接件的表面以及调整零件或螺母的轴向位置

A、 B 和C

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【单选题】The man didn’t admit _________ anything at the store, when he was questioned by the police.

to steal

having stolen

to have stolen

having been stolen

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【简答题】垫圈及弹簧垫圈的作用是什么？

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【单选题】Though the old man didn’t have enough money, ________ he gave a thousand yuan to the charity.

and

but

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【单选题】关系模式Sailors(sid,lastname.firtname,age,ratring)其中lastname允许为空. 下面哪个语句能够查找出lastname属性值不为空的水手信息.

SELECT * FROM SAILORS WHERE LASTNAME<>'NULL'

SELECT * FROM SAILORS WHERE LASTNAME<>NULL

SELECT * FROM SAILORS WHERE LASTNAME IS not NULL

SELECT * FROM SAILORS WHERE LASTNAME not LIKE 'NULL'

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【单选题】The man didn’t want people know his age, ____ he did not want to have any gray hair.

however

but

otherwise

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【单选题】The man didn’t want people to know his age, ____ he did not want to have any gray hair.

however

but

otherwise

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