問題詳情
7. 直线l过点（-1，2）且与直线垂直，则l的方程是
(A)．3x+2y-1=0
(B). 3x+2y+7=0
(C). 2x-3y+5=0
(D). 2x-3y+8=0
(A)．3x+2y-1=0
(B). 3x+2y+7=0
(C). 2x-3y+5=0
(D). 2x-3y+8=0
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
內容推薦
- 11．若A为不等式组 表示的平面区域，则当a从-2变化到1时，动直线x+y=a扫过A中的那部分区域的面积为；(A)．3/4(B)．1(C)．7/4(D)．2
- (A) events (B) chances (C) feelings (D) moments
- 下列曲线中离心率为 的是(A). (B). (C). (D).
- 考察正方体6个面的中心，从中任意选3个点连成三角形，再把剩下的3个点也连成三角形，则所得的两个三角形全等的概率等于(A).1(B). 1/2(C). 1/3(D). 0
- 下列何種聽力損失的聽閾值符合接受特殊教育的資格，但卻未能申請身心障礙手冊？(A)20 分貝 (B)45 分貝 (C)55 分貝 (D)60 分貝。
- "We can' t go out in this weather," said Bob, ______ out of the window.(A) lookin
- (A) duty (B) effort (C) job (D) task
- (A) make up (B) 'connect with (C) control (D) explain
- 10．若过点A(4,0)的直线l与曲线(x-2)2+y2=1有公共点，则直线l的斜率的取值范围为：(A)． (B)． (C)． (D)．
- 5．在三角形ABC中，AB=5，AC=3，BC=7，则∠ABC的大小为：(A)． (B)． (C)． (D)．
內容推薦
- (A) Instead (B) Normally (C) Certainly (D) Then
- I ______ you not to move my dictionary -- now I can' t find it.(A) asked (B) ask (C) was as
- When flint _______ to the market, these products enjoyed great success.(A) introducing (B) intro
- 6．函数f(x)=(x-1)2+1,(x≤0)的反函数为：(A)． (B)． (C)． (D)．
- (A) description (B) pointing (C) scene (D) talk
- (A) general (B) deep (C) personal (D) lively
- If you buy more than ten, they knock 20 pence off ______.(A) a price (B) price (C) the price (D)
- 7． ，则 中奇数的个数为：(A)．2(B)．3(C)．4(D)．5
- There were dirty marks on her trousers ______ she had wiped her hands.(A) where (B) which (C) wh
- (A) Surprisingly (B) Suddenly (C) Expectedly (D) Fortunately
- (A) Interested (B) Anxiously (C) Seriously (D) Encouraged
- — Do you like ______ here?—Oh, yes. The air, the weather, the way of life. Everything is so nice
- 设a＜b，函数 的图像可能是(A). (B). (C). (D).
- The evening news comes on at Seven o' clock and ______ only thirty minutes.(A) keeps (B) co
- (A) film (B) story (C) program (D) article
- (A) cooking (B) history (C) play (D) medicine
- I must be getting fat - I can ______ do my trousers up.(A) fairly (B) hardly (C) nearly (D) seld
- — Has Sam finished his homework today?—I have no idea. He ______ it this morning.(A) did (B) has
- (A) a foreign (B) a popular (C) an unusual (D) an unknown
- (A) known (B) sent (C) realized (D) ordered
- According to the art dealer, the painting ______ to go for at least a million dollars.(A) is exp
- (A) unchanged (B) excited (C) determined (D) unmoved
- (A) Now that (B) Even though (C) Just because (D) Except that
- That' s an unpleasant thing to say about your father after______ he' s done for you.(A
- (A) life (B) city (C) house (D) way