变质剂

题型:名词解释

问题:

变质剂

考点:机械工程金属的晶体结构与结晶金属的晶体结构与结晶题库
题型:名词解释

在Linux中,可以移动文件的命令是 (48) ,可以用于改变属主的命令是 (49)

A.chmod
B.chown
C.chgrp
D.touch

题型:名词解释

功率因数是指电动机从电网中吸取的有功功率和()的比值。

A、视在功率

B、励磁电流

C、无功功率

D、谐波

题型:名词解释

下列过程属于放热反应的是(   )

A.在生石灰中加水

B.硝酸铵溶于水

C.浓硫酸加水稀释

D.用石灰石煅烧石灰

题型:名词解释

Directions: Write an English composition according to the instructions given below in Chinese.

为了丰富同学们的课外活动,校学生会决定组建无线电俱乐部。假如你是学生会 * * ,请根据以下提示,用英语准备一份口头通知。通知要求包括以下几点:

1. 俱乐部的主要活动:

(1) 每天课间播放音乐

(2) 每天下午告诉学生天气情况和新闻

(3) 考试期间,有一个特殊节目告诉学生应该做什么,不应该做什么

2. 参加俱乐部的好处:(内容自拟,至少两点)

3. 如何加入俱乐部:可以亲自到5号大楼6层602房间报名,也可以拨打电话051 385 550 055

注意: 1. 词数120左右,开头与结尾已写好,但不计入总词数;

2. 通知应包括以上所有信息,可适当发挥;

Good afternoon,everyone!

In order to                                                                                                   

                                                              

                                                          

                                                         

Don’t wait! Join us now! Thank you!

题型:名词解释

Every second in the United States alone, more than 250 animals are slaughtered for food, adding up to more than 8 billion animals each year. Reducing the amount of meat in one’s diet is nutritionally, environmentally, and ethically beneficial.

People who eat meat usually have weaker immune systems compared to those of vegetarians. Meat has been directly linked to diabetes, obesity, arthritis, and many other illnesses. Furthermore, meat-eaters are at a higher risk for diseases, including cancer, and they are more likely to die from these diseases. Critics say that a meatless diet does not provide enough nutrients, especially protein and iron. Actually, according to A Teen’s Guide to Going Vegetarian, by Judy Krizmanic, protein is found in almost every food, and iron appears in many vegetables. Getting enough nutrients in a meat-reduced diet should not be difficult. A 1988 study found that some of the highest pesticide residues appear in meat and eggs. Diets including more fruits and vegetables will only make people healthier.

Some skeptics believe that there will be a shortage of food if animals are not eaten. In fact, the opposite is true. More than 80% of the corn and 95% of the oats grown in the US are fed to livestock. The world’s cattle alone consume enough food to equal the caloric needs of 8.7 billion people, more than the entire human population. One half of the water used in the Unites States also goes to livestock; 2.50 gallons of water produces only 1 pound of beef. If people eat less meat and more plants, the amount of available food will increase.

Many people become vegetarians because they feel that eating animals is unethical. 90% of these animals are raised in confinement. Chickens and other birds have only about half. a square foot of space each, and since they are raised so close together, a hot blade is used to cut off their beaks to prevent them from pecking each other to death. Likewise, pigs that are repressed will bite each other’s tails, so both their teeth and tails are removed as soon as they are born.

Eating animals is hazardous in numerous ways. Even a slight reduction in meat intake is better than nothing at all. Consuming less meat is beneficial to the health of animals, the health of people, and to the health of the world.

Why do some people become vegetarians()

A. Because they want to develop a p immune system

B. Because some of the highest pesticide residues appear in meat

C.Because fruits and vegetables contain more nutrients

D. Because they consider eating animals as unethical

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