二次函数y=-3(x-2)2+9图象的开口方向,对称轴和顶点坐标分别为( ) A

题型:选择题

问题:

二次函数y=-3(x-2)2+9图象的开口方向,对称轴和顶点坐标分别为(  )

A.开口向下,对称轴为直线x=-2,顶点坐标(2,9)

B.开口向下,对称轴为直线x=2,顶点坐标(2,9)

C.开口向上,对称轴为直线x=-2,顶点坐标(-2,9)

D.开口向上,对称轴为直线x=2,顶点坐标(-2,一9)

考点:二次函数的定义
题型:选择题

阅读理解。

   Mary was an operator(接话员) of 911 in Los Angeles. One Thursday morning, she was surprised to get a call

from a little girl. She said, "Mom my ill, Mom my ill,"again and again, Mary soon found the address of the call.

She called the police. In a minute, the policemen and doctors arrived at the house. They broke the door open.

They couldn't believe their eyes. The little child was so young that she could not walk! She was sitting beside

her mother and holding her mother's hand. Tears were running down her face.

   The doctors gave the woman some medicine and soon she woke up. Later, she told people, "Everyone was

surprised that my daughter could call 911. On Monday I tried to teach her how to call 911, but she couldn't

do it. Mary was surprised, too. "It's the first time I have seen a two-year-old child call 911."

1. What did the girl really want to say?

A."Mom, I'm ill."

B."My mom is ill."

C."Mom and I are ill."

2. How did the policemen feel when they got into the room? .

A. Strange.

B. Normal.

C. Surprised

3. How did the policemen get into the room?

A. By breaking the door.

B. With the girl's help.

C. Through the window

4. What does the underlined (下划线的) word"it" mean?

A. 911.

B. Calling 911.

C. Walking.

5. What can we learn from the passage?

A. The little girl was so clever that she could call 911 when she was 2.

B. The love for her mother created the miracle (奇迹).

C. The mother knew she had to teach the little girl how to call 911.

题型:选择题

某男,43岁。胃脘胀满,口渴欲饮,水入则吐,胃中有振水声,苔白滑,脉弦。临床诊断最可能是()

A.饮停于胃证

B.胃寒证

C.脾阳虚证

D.脾虚湿阻证

E.寒湿困脾证

题型:选择题

More and more residences, businesses, and even government agencies are using telephone answering machines to take messages or give information or instructions. Sometimes these machines give (1) instructions, or play messages that are difficult to understand. If you (2) telephone calls, you need to be ready to respond when you get a (3)

The most common machine is the (4) used in residence. If you call a home (5) there is a telephone answering machine (6) you will hear several rings and then a recorded message that (7) says something like this: "Hello. We can’t come to the (8) right now. If you want us to call you back, please leave your name and number after the beep." Then you will hear a "beep", (9) is a brief, high-pitched (10) . After the beep, you can say who you are, whom you want to speak to, and what number the person should call to (11) you, or you can leave a (12) . Some telephone answering machines record for only 20 or 30 seconds after the beep, (13) you must respond quickly.

Some large businesses and government agencies are using telephone answering machines to provide information on (14) about which they receive a large volume of (15) . Generally speaking, using these systems (16) you to have a touch-tone phone ( a phone with buttons rather than a rotary dial). The voice on the machine will tell you to (17) a certain button on your telephone if you want information on Topic A, another button for Topic B, and so on. You listen (18) you hear the topic you want to learn about, and then you push the (19) button. Immediately after making your (20) , you will hear a recorded message on the topic.

10()

A.in hand

B.in detail

C.in operation

D.in dispute

题型:选择题

下面程序的执行结果是______。
main()
char str[]="quert",*p=str;
while(putchar(*p++)!='');

A) quert
B) Rvfsu
C) quert
D) rvfsu

题型:选择题

选民不能直接投票的,依法可以选择的投票方式包括()。

A.书信的方式

B.传真、短信的方式

C.电子邮件的方式

D.本村村民委员会换届选举办法认可的形式

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