已知抛物线y=ax2-1的焦点是坐标原点,则以抛物线与两坐标轴的三个交点为顶点的

题型:填空题

问题:

已知抛物线y=ax2-1的焦点是坐标原点,则以抛物线与两坐标轴的三个交点为顶点的三角形面积为______.

考点:直线与抛物线的应用
题型:填空题

补全对话 (共5小题;每小题2分,满分10分)

根据对话内容,从对话后的选项中选出能填入空白处的最佳选项,选项中有两项多余选项。

M:Excuse me. Can you give me some information about active holidays?

W: ___1_____ Would you please tell exactly what you mean?

M: OK. When I go on holidays, I’d like to take exercise. _2_____ What I mean is that I’m the sort of man who enjoys swimming, skiing and those sorts of things.

W: __3____ Um…. active holidays, let me see. What about diving, sir? We can offer you two weeks off the coast: one week diving and one week fishing with the local fishermen. But you only need to pay $800 for it. __4____

M: Fishing? Is there any chance of getting in a bit of sailing?

W: 5____ They are mostly organized by the sailing school. But rowing, yes. Are you interested in rowing, sir?

M: Well, I did a lot of rowing when I was at university.

A.I hate sitting around and doing nothing.

B.No problem.

C.Active holidays, sir?

D.It’s a very good bargain.E. It’s a bit difficult.

F. I’m sorry we don’t do many sailing holidays, sir.

G. Oh, sir, sounds very interesting.

题型:填空题

棉花伏前桃,伏桃和秋桃是怎样划分的?

题型:填空题

如果小国对进口商征收关税,那么关税造成的消费者损失小于国内生产商收益与政府关税收入之和。

题型:填空题

根据我国医学专业学位的设置,核医学属于()

A.影像医学

B.影像诊断医学

C.放射医学

D.影像医学与核医学

E.以上均不对

题型:填空题

梯形螺纹的牙型角为()。

A.29°

B.30°

C.33°

D.40°

更多题库