抛物线x=-18y2的焦点坐标是( ) A.(-2,0) B.(2,0) C.(0,1

题型:选择题

问题:

抛物线x=-
1
8
y2
的焦点坐标是(  )
A.(-2,0)B.(2,0)C.(0,
1
32
)
D.(0,-
1
32
)
考点:抛物线的性质(顶点、范围、对称性、离心率)
题型:选择题

沙漠地区的植物通常有很发达的根系和较小的叶片,主要原因是沙漠地区(  )

A.缺水

B.光照强

C.土壤贫瘠

D.温度高

题型:选择题

根据对话内容,从下面方框中选择适当的单词或短语填空,使对话内容完整正确

A: Hi, Lisa. Do you know that people are talking about the future dreams a lot these days?

B: Yes. That’s a hot topic    小题1: .

A: Do you have a plan for the future? I mean what your dream is.

B: Yes. I have a lot of dreams. But the greatest one is that I want to be a teacher.

A: Sounds nice. But how are you going to do that?

B: Well, I’m going to study hard and do well in all the   小题2:  .

A: Anything more?

B: And I’m going to play more sports to   小题3:  .

A: Where are you going to work?

B: I’m going to work in a village school in the poor area. I hear they need teachers very much. I think to be a village school teacher is very great.

A: That   小题4: ! But when are you going to start?

B: I am going to finish high school and college first.

A: That’s good. I hope your dream will    小题5: .

B: I hope so. Thank you.

题型:选择题

下列那一项不作为液体疗法的主要监测的内容

A.体温变化

B.血压、脉搏变化

C.尿量的变化

D.渴及皮肤弹性

E.精神状态

题型:选择题

无细胞壁结构的微生物是

A.革兰阴性细菌
B.真菌
C.支原体
D.立克次体
E.衣原体的原体

题型:选择题

在水闸设计中,为了适应地基的不均匀沉降和伸缩变形,缝有铅直和水平两种,缝宽一般为()。

A.1.0~2.5mm

B.5.0~10.0mm

C.1.O~2.5cm

D.5.0~10.0cm

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