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【单选题】
按我国现行规定,氩气的纯度应达到( )才能满足焊接的要求。
A.
98.5%
B.
99.5%
C.
99.95%
D.
99.99%
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【简答题】Assignment 1 第一次作业 看超星上的短片 英语史,回答如下问题: 1 Q: What's the major characteristic of the Anglo-Saxon words? PLS Note down all the related words mentioned in the audio clip. 2 Who brings intoEnglish ”give" ...
【简答题】数据表中的行称为__,数据表中的列称为__。
【简答题】These days,cars are designed using computers.Let’s look at how a new car is created. First,several 16 talk about the new car and any good ideas that they have.Then they sit down at their computers and...
【单选题】-- ____ have you lived in New York, Jane? -- For about 16 years.
A.
How many
B.
How much
C.
How long
D.
How often
【单选题】Our teacher _________ a report this afternoon. Don’t miss it.
A.
gives
B.
was given
C.
is giving
D.
has given
【简答题】Questions 16to 19are based on following passage.  This brand new aircraft is designed with four classes of service:First Class, Business Class,Premium Economy Class and Economy Class,meeting passenge...
【简答题】在关系数据模型中,数据库表的列称为 ,数据库表的行称之为 。
【单选题】在关系型数据库中,数据表中的行和列分别称为()。
A.
记录和字段
B.
字段和记录
C.
记录和关键字
D.
字段和关键字
【单选题】----How many new words are there in ________ lesson? ----There are only _________.
A.
five; fifth
B.
fifth; five
C.
the fifth; the five
D.
the fifth; five
【简答题】Read and number. (排序) (1) (    ) How many kites can you see? (    ) Look at my new kite. (    ) I can see 16. (    ) How nice ! (2) (    ) He's my brother. (    ) No , he's a teacher. (    ) Who's tha...
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