皮皮学,免费搜题
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【单选题】
You’d better cut your hair short. Our school doesn’t _______ long hair.
A.
approve of students’ wearing
B.
approve students to wear
C.
approve students’ wearing
D.
approve of students to wear
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【单选题】已知直线l过点(-2,0),当直线l与圆x 2 +y 2 =2x有两个交点时,其斜率k的取值范围是 [     ]
A.
(-2 ,2 )
B.
(- , )
C.
【简答题】已知直线l过点(-2,0),当直线l与圆x 2 +y 2 =2x有两个交点时,其斜率k的取值范围是________.
【单选题】Speaking refers to character monologs and_________,which serve to propel the development of the story.
A.
words
B.
lines
C.
dialog ue s
D.
songs
【单选题】Speaking refers to character monologues and__________, which serve to propel the development of the story.
A.
words
B.
lines
C.
dialogues
D.
Songs
【单选题】宏观环境也称做。
A.
经济环境
B.
直接营销环境
C.
间接营销环境
D.
公众
【单选题】已知直线l过点(-2,0),当直线l与圆x 2 +y 2 =2x有两个交点时,其斜率k的取值范围是(  )
A.
(-2 ,2 )
B.
(- , )
C.
(- )
D.
(- )
【单选题】Speaking refers to character monologs and __________ , which serve to propel the development of the story.
A.
words
B.
lines
C.
dialogs
D.
Songs
【单选题】已知直线l过点(-2,0),当直线l与圆x 2 +y 2 =2x有两个交点时,其斜率k的取值范围是(  )
A.
(-2 2 ,2 2 )
B.
(- 2 , 2 )
C.
(- 2 4 , 2 4 )
D.
(- 1 8 , 1 8 )
【简答题】蛋白质的基本组成单位是 ,包括 种
【简答题】已知直线l:(2a+b)x+(a+b)y+a-b=0及点P(3,4). (1)证明直线l过某定点,并求该定点的坐标. (2)当点P到直线l的距离最大时,求直线l的方程.
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