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【单选题】
Elle est______à Paris hier matin.
A.
est arrivé
B.
a  arrivé
C.
est arrivée
D.
a arrivée
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参考答案:
举一反三
【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)
【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)
【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:]
【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: ]
【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。
【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:]
【简答题】(10分)有一包从海水中获得的粗盐,已经经过初步的提纯。课外活动小组对它的成分进行探究,并将粗盐进一步提纯。 探究一:这包粗盐中还含有什么杂质? 根据海水的成分和初步提纯的实验操作,估计该粗盐可能还含有的杂质是CaCl 2 和MgCl 2 。现用实验验证这种推测:取样并溶解,加入数滴NaOH溶液,目的是检验是否会有 (填化学式,下同);接着再加入数滴Na 2 CO 3 溶液,目的是检验是否会有 。...
【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
【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.
【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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