二次函数y=-x2-2x+2的顶点坐标是( ) A.(1,3) B.(-1,3)

题型:选择题

问题:

二次函数y=-x2-2x+2的顶点坐标是(  )

A.(1,3)

B.(-1,3)

C.(-1,-3)

D.(1,-3)

考点:二次函数的定义
题型:选择题

DJ6级光学经纬仪的主要组成部分是

A.望远镜、水准管、度盘

B.基座、照准部、水平度盘

C.三脚架、基座、照准部

D.仪器箱、照准部、三脚架

题型:选择题

阅读理解。

     One day, while a woodcutter was cutting a branch of a tree above a river, his axe fell into the river. When

he began to cry, God appeared and asked him, "Why are you crying?"

     The woodcutter told him that he had dropped his axe into water. God went into the river and reappeared

with a gold axe.

     "Is this your axe?" God asked.

     The woodcutter said "No".

     God again went down and came up with a silver axe. "Is this your axe?" God asked.

     The woodcutter said "No".

     God again went down and came up with an iron axe. "Is this your axe?" God asked.

     The woodcutter said "Yes".

     God was pleased with the man's honesty and gave him all the three axes. The woodcutter went home

happily. One day while he was walking with his wife along the river, his wife fell into the river. When began

crying, God appeared and asked him, "Why are you crying?"

     "My wife has fallen into water." God again went down and came up with Avril Lavigne. "Is this your wife?" 

     "Yes"the woodcutter said.

     God was furious, "YOU CHEAT! Now I am going to curse you". 

     The woodcutter quickly said, "Forgive me, My Lord. It is a misunderstanding. If I say NO to Avril Lavigne,

you'll came up with Taylor Swift. If I also say NO to her, you will finally came up with my wife and I will say

YES. Then you will give all the three to me, I am a poor man. I will not be able to look after all the three. So

that is why I said 'YES'".

1. Which of the following best describe the author's tone in telling the story? [ ]

A. pessimistic

B. Objective

C. Subjective

D. Humoristic

2. The impression that the woodcutter makes on you is that he is _____.[ ]

A. foolish but honest

B. foolish and honest

C. smart and honest

D. smart but dishonest

3. What can you infer about Avril Lavigne and Taylor Swift? [ ]

A. They are the secret lovers of the woodcutter.

B. They are both popular women,much worthy than his wife.

C. They are both rich women with a lot of gold and silver.

D. They look much like the woodcutter's wife.

题型:选择题

不属于小脑性共济失调的表现的是()

A.辨距不良,动作愈接近目标时震颤愈明显

B.说话缓慢、发音不清和声音断续、,顿挫或爆发式

C.双眼粗大眼震

D.对侧患肢不同程度的共济失调,闭眼时症状明显

E.患者站立不稳,步态蹒跚,坐位时将双手和两腿呈外展位分开

题型:选择题

评价活性污泥的指标主要有(),(),(),(),()。

题型:选择题

车辆弯道行驶时,差速器两侧半轴齿轮的()。

A、转速相等

B、转速不等

C、转矩相等

D、转矩不等

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