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One of the main reasons for air pollution is that many cars _______ smoke into the at

mosphere.

A、gather

B、hire

C、discharge

D、escape

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更多“One of the main reasons for ai…”相关的问题
第1题
The Palace Museum is designated one of China's main protected monuments in 1971
. ()

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第2题
What's the main idea of paragraph one?A.The author is a student of an American university.

What's the main idea of paragraph one?

A.The author is a student of an American university.

B.There are differences between America and Lebanon.

C.American system of college education differs from Lebanese one.

D.Studying is hard.

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第3题
One of the main disadvantages of the corporate form. is the()

A、professional management

B、double taxation of dividends

C、charter

D、corporation must issue stock

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第4题
Bicycle riders want the city government to set aside special lanes for bicycles on so
me of the main streets, but though they have got some supporters, ()likes the idea.

A、everyone

B、not everyone

C、no one

D、someone

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第5题
The main idea of paragraph 3 is ______.A.the people in this province came from many places

The main idea of paragraph 3 is ______.

A.the people in this province came from many places

B.not many people from France or Spain came here

C.there are more Asians in this province than in the other provinces

D.the people in this province came from one place

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第6题
One of the main advantages of a graphite-furnace atomizer is that() A.it requires only vety small

A.A.it requires only vety small quantities of a sampk

B.B.it requires metal ions in aqueous solution

C.C.it does not produce background emission like a flame

D.D.it does not get hot like a flame

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第7题
public class X extends Frame{ public static void main(String[] args){ X x=new X();x.p
ack();x.setVisible(true); } public X(){ setLayout(new GridLayout(2,2)); Panel p1=new Panel(); add(p1); Button b1

A.all change height and width

B.Button Two change height and Button Three change width

C.Button One change height

D.Button Four change height and width

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第8题
import java.awt.*; public class X extends Frame{ public static void main(String[] args
import java.awt.*;

public class X extends Frame{

public static void main(String[] args){

X x=new X();x.pack();x.setVisible(true);

}

public X(){

setLayout(new GridLayout(2,2));

Panel p1=new Panel(); add(p1);

Button b1=new Button("One"); p1.add(b1);

Panel p2=new Panel(); add(p2);

Button b2=new Button("Two"); p2.add(b2);

Button b3=new Button("Three"); p2.add(b3);

Button b4=new Button("Four"); add(b4);

}

}

when the frame. is resized, ()

A.all change height and width

B.Button Two change height and Button Three change width

C.Button One change height

D.Button Four change height and width

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第9题
In the year 2100, the world is going to have a population of about 8 billion. Most scienti
sts agree that the most severe problem is food supply. Who is going to feed all these people? Where is the food going to come from? Are we going to have enough food? Are we going to produce more artificial foods? One way of improving the situation is for people to eat less meat. Why? Because it takes 4 kilos of grain protein(蛋白质)to produce half a kilo of meat protein. Clearly, there is not going to be sufficient meat protein for 8 billion people. Therefore, it will also be necessary to change eating habits because meat is the main part of many people s food today. A possible solution to this latter problem is the soybean(大豆). The soybean plant produces beans which have a very high fat and protein content. Scientists can now make these look and taste like real meat. They can also make many other artificial products such as soybean milk, for example, which has a taste of milk and can be used in cooking in very much the same ways as cow s milk. In fact, one woman in the United States fed her family only on soybeans for a year! She gave them soybean beef, soybean chicken, soybean milk, and sometimes just soybeans. Possibly, we are all going to eat soybeans in the future and finally give up meat completely from our tables.

What is the main subject of the passage?

A.A solution to man"s food problem.

B.A solution to the population problem.

C.Advantages of soybean.

D.How to develop good eating habits.

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第10题
Elizabeth Blackwell was born in England in 1821, and moved to New York City when she w
as ten years old. One day she decided that she wanted to become a doctor. That was nearly impossible for a woman in the middle of the nineteenth century. After writing many letters asking for admission to medical schools, she was finally accepted by a doctor in Philadelphia. She was so determined that she taught school and gave music lessons to get money for the cost of schooling.

In 1849, after graduation from medical school, she decided to further her education in Paris. She wanted to be a surgeon(外科医师), but a serious eye problem forced her to give up the idea.

Upon returning to the United States, she found it difficult to start her own practice because she was a woman. By 1857 Elizabeth and her sister, also a doctor, along with another woman doctor, managed to open a new hospital, the first for women and children Besides being the first woman physician and founding her own hospital , she also set up the first medical school for women.

(1) Why couldn’t Elizabeth Blackwell realize her dream of becoming a surgeon?

A.She couldn’t get admitted to medical school.

B.She decided to further her education in Paris.

C.A serious eye problem stopped her.

D.It was difficult for her to start a practice in the United States.

(2) What main obstacle almost destroyed Elizabeth’s chances for becoming for a doctor?

A.She was a woman.

B.She wrote too many letters.

C.She couldn’t graduate from medical school.

D.She couldn’t set up her hospital.

(3) How many years passed between her graduation from medical school and the opening of her hospital?

A.Eight years B.Ten years

C.Nineteen years D.Thirty-six years

(4) According to the passage, all of the following are “firsts” in the life of Elizabeth Blackwell,

A.became the first woman physician.

B.was the first woman doctor.

C.and several other women founded the first hospital for women and children.

D.set up the first medical school for women.

(5) Elizabeth Blackwell spent most of her lift in_______.

A.England

B.Paris

C.the United States

D.New York City

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第11题
What are the main parameters of ion selective electrode?
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