皮皮学，免费搜题
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【单选题】
根据比较优势原理的政策经验，一国从国际贸易中获益的条件是
A.
制造大量出口顺差
B.
以较低的机会成本进口商品而不是在国内生产
C.
本国比贸易伙伴强大
D.
本国相对于贸易伙伴具备绝对效率优势
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【简答题】创建一个名为view_stu的视图，将student数据表中的sno,sname,sbirthday三列导入到该视图中，并分别命名为“学号”，“姓名”，“出生日期”。 create view as select  sno,sname,sbirthday   from  student;A. view_stu(学号,姓名,出生日期)
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【简答题】创建一个名为view_stu的视图，将student数据表中的sno,sname,sbirthday三列导入到该视图中，并分别命名为“学号”，“姓名”，“出生日期”。 create view as select  sno,sname,sbirthday   from  student;A. view_stu(学号,姓名,出生日期)
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【单选题】As for the pronunciation of 'a' in a word like 'dance', ______
A.
all Americans pronounce it as [ae]
B.
all British people pronounce it as [a:]
C.
educated speakers in Britain pronounce it as [a:]
D.
people in American West pronounce it as [a:]
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【单选题】As for the pronunciation of 'a' in a word like 'dance', ______.
A.
all Americans pronounce it as [e]
B.
all British people pronounce it as [ o: ]
C.
educated speakers in Britain pronounce it as[ a: ]
D.
people in American West pronounce it as [ a: ]
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【单选题】What are the speakersdiscussing?
A.
Whetherto go on a holiday．
B.
Howto pay for the house．
C.
Whetherto find a better job．
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【简答题】创建一个名为view_score_ch的学生成绩视图，只查询成绩及格(大于60分)的学号、姓名、课程、成绩、学期信息，并通过该视图将学号为11001、课程名称为电子商务基础的成绩先修改为90分，再修改为50分。
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【单选题】As for the pronunciation of 'a' in a word like 'dance',______.
A.
all Americans pronounce it as [se]
B.
all British people pronounce it as [a:]
C.
educated speakers in Britain pronounce it as [a:]
D.
people in American West pronounce it as [a:]
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【单选题】All the students at school are required to ____ lectures by the experts on howto save themselves when accidents occur, such as fires, a gas leak and so on.
A.
join in
B.
take part in
C.
attend
D.
participate in
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【单选题】What is the proper way to pronounce the same sound linking, such as “kiss someone”?
A.
Pronounce the sound only once.
B.
Pronounce the sound twice.
C.
Hold the same sound longer.
D.
None of the above.
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【简答题】（4分）实验小组的同学欲对一粗盐样品进行初步提纯。所用实验仪器或用品如下： （1）A的名称是 ； （2）提纯的步骤是：溶解、过滤  、 、计算产率； （3）“过滤”操作的要点可概括为“一贴、二低、三靠”，其中“二低”的含义是 ； （4）实验小组通过正确的计算发现，所得实验结果对与该粗盐的实际含量对比，实验测得的结果比实际偏低，请分析可能的原因： 。
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相关题目：
【简答题】创建一个名为view_stu的视图，将student数据表中的sno,sname,sbirthday三列导入到该视图中，并分别命名为“学号”，“姓名”，“出生日期”。 create view as select  sno,sname,sbirthday   from  student;A. view_stu(学号,姓名,出生日期)
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【简答题】创建一个名为view_stu的视图，将student数据表中的sno,sname,sbirthday三列导入到该视图中，并分别命名为“学号”，“姓名”，“出生日期”。 create view as select  sno,sname,sbirthday   from  student;A. view_stu(学号,姓名,出生日期)
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【单选题】As for the pronunciation of 'a' in a word like 'dance', ______
A.
all Americans pronounce it as [ae]
B.
all British people pronounce it as [a:]
C.
educated speakers in Britain pronounce it as [a:]
D.
people in American West pronounce it as [a:]
查看完整题目与答案
【单选题】As for the pronunciation of 'a' in a word like 'dance', ______.
A.
all Americans pronounce it as [e]
B.
all British people pronounce it as [ o: ]
C.
educated speakers in Britain pronounce it as[ a: ]
D.
people in American West pronounce it as [ a: ]
查看完整题目与答案
【单选题】What are the speakersdiscussing?
A.
Whetherto go on a holiday．
B.
Howto pay for the house．
C.
Whetherto find a better job．
查看完整题目与答案
【简答题】创建一个名为view_score_ch的学生成绩视图，只查询成绩及格(大于60分)的学号、姓名、课程、成绩、学期信息，并通过该视图将学号为11001、课程名称为电子商务基础的成绩先修改为90分，再修改为50分。
查看完整题目与答案
【单选题】As for the pronunciation of 'a' in a word like 'dance',______.
A.
all Americans pronounce it as [se]
B.
all British people pronounce it as [a:]
C.
educated speakers in Britain pronounce it as [a:]
D.
people in American West pronounce it as [a:]
查看完整题目与答案
【单选题】All the students at school are required to ____ lectures by the experts on howto save themselves when accidents occur, such as fires, a gas leak and so on.
A.
join in
B.
take part in
C.
attend
D.
participate in
查看完整题目与答案
【单选题】What is the proper way to pronounce the same sound linking, such as “kiss someone”?
A.
Pronounce the sound only once.
B.
Pronounce the sound twice.
C.
Hold the same sound longer.
D.
None of the above.
查看完整题目与答案
【简答题】（4分）实验小组的同学欲对一粗盐样品进行初步提纯。所用实验仪器或用品如下： （1）A的名称是 ； （2）提纯的步骤是：溶解、过滤  、 、计算产率； （3）“过滤”操作的要点可概括为“一贴、二低、三靠”，其中“二低”的含义是 ； （4）实验小组通过正确的计算发现，所得实验结果对与该粗盐的实际含量对比，实验测得的结果比实际偏低，请分析可能的原因： 。
查看完整题目与答案