二次函数y=﹣3x2﹣6x+5的图象的顶点坐标是[ ] A.(﹣1,8) B.(

题型:选择题

问题:

二次函数y=﹣3x2﹣6x+5的图象的顶点坐标是[    ]

A.(﹣1,8)

B.(1,8)

C.(﹣1,2)

D.(1,﹣4)

考点:二次函数的图像
题型:选择题

When I was growing up, I was embarrassed to be seen with my father. He (1) severely crippled and very short, and when we would walk together, his hand on my arm (2) balance, people would stare. I would inwardly be afraid (3) squirm at the unwanted attention. If he ever noticed or was bothered, he never let (4) .
It was difficult to coordinate (5) steps - his halting, mine impatient - and because of that, we didn’t say much as we went along. But as we started out, he always said, "You (6) the pace. I will try to adjust to you. "
Our usual walk was to or (7) the subway, which was how he got to (8) . He went to work sick, and (9) nasty weather. He almost never missed a day, and would (10) it to the office even if (11) could not: a matter of pride!
He never talked about himself as an object of pity, (12) did he show any envy of the more fortunate or able. What he looked for in others was a "good heart", and if he found one, the owner was good enough for him.
Now that I am older, I believe that is a proper standard (13) which to judge people, even though I still don’t know precisely (14) a "good heart" is. But I know the times I don’t have one myself.
He has (15) gone many years now, but I think (16) him often. I wonder if he sensed my reluctance to be seen with him during our (17) . If he did, I am (18) I never told him how sorry I was, how unworthy I was, how I regretted it. I think of him when I complain about trifles, when I am (19) of another’s good fortune, when I don’t have a "good heart".
At such times I put my hand on his arm to regain my (20) , and say, "You set the pace, I will try to adjust to you.\

题型:选择题
给出下列四个命题:
①函数f(x)=lnx-2+x在区间(1,e)上存在零点;
②若f'(x0)=0,则函数y=f(x)在x=x0取得极值;
③m≥-1,则函数y=log
1
2
(x2-2x-m)
的值域为R;
④“a=1”是“函数f(x)=
a-ex
1+aex
在定义域上是奇函数”的充分不必要条件.
其中真命题是 ______(把你认为正确的命题序号都填在横线上)
题型:选择题

WHO1995年制订的肾小球病病理学分类标准是()。

A.局灶性节段性病变

B.新月体肾小球肾炎

C.轻微性肾小球肾炎

D.弥漫性肾小球肾炎

E.未分类的肾小球肾炎

题型:选择题

甲状腺较大疑有压迫气管选何种麻醉方法

A.静脉全麻

B.高位硬膜外

C.气管插管全麻

D.颈丛阻滞

题型:选择题

在考虑由于周围建筑物引起的空气扰动而导致地面局部高浓度的现象时,需调查( )。

A.建筑物高度

B.建筑物下洗参数

C.建筑物占地面积

D.建筑物海拔

更多题库