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【多选题】
下列哪些手段有助于扩大商圈范围（ ）
A.
变化每天的促销活动主题
B.
增加高购买比例商品的性价比
C.
在边缘区域的小区做公关活动
D.
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【判断题】严格执行剧毒品“五双”管理制度,即使实验在进行中,也必须在取出实验使用量后立即存入保险柜,做好记录,严防疏漏。
A.
正确
B.
错误
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【单选题】在完成用户画像调研时,有效问卷达到( )份,才符合统计学中大样本的概念。
A.
20
B.
30
C.
50
D.
100
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【单选题】A) They are widely applicable for massive open online courses. B) They are now being used by numerous high school teachers. C) They could read as many as 10, 000 essays in a single minute. D) They cou...
A.
They are widely applicable for massive open online courses.
B.
They are now being used by numerous high school teachers.
C.
They could read as many as 10, 000 essays in a single minute.
D.
They could grade high-school essays just like human teachers
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【单选题】Teachers using red pen to mark students work could be harming their psyche as the color is too aggressive, according to education strategies drafted by an Australian state government. The 'Good Mental...
A.
red color is too eye-catching
B.
it may hurt students' feelings
C.
it is against the state law
D.
colors are too aggressive
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【简答题】已知动点M到定点F（1，0）的距离与到定直线l：x=-1的距离相等，点C在直线上。 （1）求动点M的轨迹方程； （2）设过定点F，法向量 =（4，-3）的直线与（1）中的轨迹相交于A，B两点，判断 能否为钝角并说明理由。
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【单选题】The title of this passage could probably be
A.
Let Teachers Stop Work
B.
Let Us Make Children Learn
C.
Let Children Correct Their Own Papers
D.
Let Children Learn by Themselves
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【单选题】— Could you do me a favor to take these books to the teachers’ office? —________.
A.
With pleasure
B.
That’s very kind of you
C.
Good idea
D.
Yes, that’s right
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【单选题】Parents' Homework: Find Perfect Teachers for Kids Tomi Hall did what she could to lobby for the best teachers for her two children, making her case this spring in letters to the principal. Then all sh...
A.
they are used to directing nearly all aspects of their child
B.
they are used to spending hours crafting the perfect letter
C.
they consider their decision is critical
D.
they consider the teacher is critical
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【判断题】已知动点M到定点 (-4,0), (4,0)距离之和是不小于8的常数,则动点M的轨迹是线段。 ( )
A.
正确
B.
错误
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【简答题】已知定点A（-2，0），B（2，0），及定点F（1，0），定直线l：x=4，不在x轴上的动点M到定点F的距离是它到定直线l的距离的 1 2 倍，设点M的轨迹为E，点C是轨迹E上的任一点，直线AC与BC分别交直线l与点P，Q． （1）求点M的轨迹E的方程； （2）试判断以线段PQ为直径的圆是否经过定点F，并说明理由．
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相关题目：
【判断题】严格执行剧毒品“五双”管理制度,即使实验在进行中,也必须在取出实验使用量后立即存入保险柜,做好记录,严防疏漏。
A.
正确
B.
错误
查看完整题目与答案
【单选题】在完成用户画像调研时,有效问卷达到( )份,才符合统计学中大样本的概念。
A.
20
B.
30
C.
50
D.
100
查看完整题目与答案
【单选题】A) They are widely applicable for massive open online courses. B) They are now being used by numerous high school teachers. C) They could read as many as 10, 000 essays in a single minute. D) They cou...
A.
They are widely applicable for massive open online courses.
B.
They are now being used by numerous high school teachers.
C.
They could read as many as 10, 000 essays in a single minute.
D.
They could grade high-school essays just like human teachers
查看完整题目与答案
【单选题】Teachers using red pen to mark students work could be harming their psyche as the color is too aggressive, according to education strategies drafted by an Australian state government. The 'Good Mental...
A.
red color is too eye-catching
B.
it may hurt students' feelings
C.
it is against the state law
D.
colors are too aggressive
查看完整题目与答案
【简答题】已知动点M到定点F（1，0）的距离与到定直线l：x=-1的距离相等，点C在直线上。 （1）求动点M的轨迹方程； （2）设过定点F，法向量 =（4，-3）的直线与（1）中的轨迹相交于A，B两点，判断 能否为钝角并说明理由。
查看完整题目与答案
【单选题】The title of this passage could probably be
A.
Let Teachers Stop Work
B.
Let Us Make Children Learn
C.
Let Children Correct Their Own Papers
D.
Let Children Learn by Themselves
查看完整题目与答案
【单选题】— Could you do me a favor to take these books to the teachers’ office? —________.
A.
With pleasure
B.
That’s very kind of you
C.
Good idea
D.
Yes, that’s right
查看完整题目与答案
【单选题】Parents' Homework: Find Perfect Teachers for Kids Tomi Hall did what she could to lobby for the best teachers for her two children, making her case this spring in letters to the principal. Then all sh...
A.
they are used to directing nearly all aspects of their child
B.
they are used to spending hours crafting the perfect letter
C.
they consider their decision is critical
D.
they consider the teacher is critical
查看完整题目与答案
【判断题】已知动点M到定点 (-4,0), (4,0)距离之和是不小于8的常数,则动点M的轨迹是线段。 ( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】已知定点A（-2，0），B（2，0），及定点F（1，0），定直线l：x=4，不在x轴上的动点M到定点F的距离是它到定直线l的距离的 1 2 倍，设点M的轨迹为E，点C是轨迹E上的任一点，直线AC与BC分别交直线l与点P，Q． （1）求点M的轨迹E的方程； （2）试判断以线段PQ为直径的圆是否经过定点F，并说明理由．
查看完整题目与答案