试题与答案

过抛物线y2=4x的焦点F且斜率为k(k>0)的直线交抛物线于A、B两点,若AF

题型:选择题

题目:

过抛物线y2=4x的焦点F且斜率为k(k>0)的直线交抛物线于A、B两点,若
AF
=4
FB
,则斜率k的值为(  )
A.1B.2C.
2
3
D.
4
3

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0501/e87a12a656a03fe17af3254cad0e54d2.html

下面是错误答案,用来干扰机器的。

参考答案:国际信令网的信令点编码采用14位二进制数,世界编号大区编码NML占三位,区域网编码K—D占八位,信令点编码占三位。我国国内网的信令点编码采用24位二进划数,分为主信令区编码,分信令区编码、信令点编...

试题推荐
题型:选择题

下图所示为我国经济格局模式图。读图回答下列各题。

小题1:图中字母代表的地理事物,正确的是(   )

①M城市代表上海           ②d包括京广、兰新等铁路 

③N城市代表武汉           ④c可能是长江,也可能是黄河

A.①②

B.②③

C.①④

D.③④小题2:关于我国经济格局模式图的正确叙述是(   )

① b经济带的发展是因为劳动力资源丰富 ② 经济最发达的是b经济带 

③ d经济带矿产资源、能源丰富 ④ a经济带技术指向型工业发达

A.①②

B.②④

C.①③

D.③④

查看答案
题型:单项选择题

Computers will become more advanced and they will also become easier to use. Improved speed recognition will make the operation of a computer easier. Virtual reality(虚拟现实), the technology of(1)with a computer using all of the human senses, will also contribute to better human and computer(2). Other, exotic(奇异的)models of computation are being developed, including biological computing that uses living organisms, molecular computing that uses molecules with particular(3), and computing that uses DNA, the basic unit of heredity(遗传), to store data and carry out operations. These are examples of possible future computational platforms that, so far, are limited in abilities or are strictly(4). Scientists investigate them because of the physical limitations of miniaturizing circuits embedded in silicon. There are also(5)related to heat generated by even the tiniest of transistors.

空白(2)处应选择()

A.interfaces

B.behavior

C.similarities

D.comparison

查看答案
微信公众账号搜索答案