更多"There are cockroaches (蟑螂) everywhe"的相关试题:
[填空题]There are cockroaches (蟑螂) everywhere on Earth except the places that are covered with ice. Scientists have discovered about 3,500 different species of cockroaches. There is just one human species! Cockroaches can be anything in size from about five mm to nine cm. Although five mm is very small, nine cm is as long as a large rat.
It is very difficult to catch most cockroaches. They"see" with the hairs on their bodies. These hairs can feel the smallest movement in the air, so the cockroaches know immediately something moves, and run to safety.
Of all the species of cockroach, fortunately only three live among humans and are a serious problem. They are the German, the Oriental, and the American. One egg case of the German cockroach can produce as many as seven million cockroaches in 12 months!
Our main problem with cockroaches is that not only do they look ugly to us, but they also carry diseases. They are particularly dangerous in hospitals as they eat all kinds of
[单项选择]蟑螂
A. 引起变态反应与过敏反应
B. 寄生
C. 蝇蛆病
D. 吸血传病
E. 机械性传播疾病
[简答题]Cockroaches know that someone or something is near because ______.
[简答题]Cockroaches can ______ because they carry bacteria.
[简答题]Cockroaches do not live in places where it is ______.
[单项选择]Ireland has the following demographic features except （ ）.
A. it has a low birthrate
B. it has a late marriage age
C. it has an excess of females in the population
D. it has a high proportion of bachelors and spinsters of all ages
[简答题]Paragraph 6 says that to kill cockroaches ______.
[简答题]打开工作簿文件EXC.XLS(内容同标准预测试卷(2)电子表格题(2)中的EXC.XLS文件)，对工作表“选修课程成绩单”内的数据清单的内容进行分类汇总(提示：分类汇总前先按主要关键字“课程名称”升序排序)，分类字段为“课程名称”，汇总方式为“计数”，汇总项为“课程名称”，汇总结果显示在数据下方，将执行分类汇总后的工作表还保存在EXC.XLS工作簿文件中，工作表名不变。
[单项选择]The Middle East Quartet includes the following EXCEPT （ ）.
A. NATO
B. Russia
C. the United States
D. the United Nations
[单项选择]The subscriber shows interest in the following EXCEPT （）.
A. poetry
B. fiction
C. biography
D. history
[单项选择]All the following sentences have an appositive EXCEPT
A. We call them moon-cakes.
B. But they have to convince everyone, especially people living in the area.
C. We both arrived at the same conclusion.
D. People, old and young, took to the streets to watch the parade.
[填空题]Nearly all natural water bodies bear fish life excepting ______.
[多项选择]Suppose that your mother is cured by receiving excellent treatment and care offered by capable doctors and nurses. Write a letter of thanks to Mr. Wilson, president of the hospital. You should write approximately 100 words. Do not sign your own name at the end of your letter, using "Jane Royal" instead. You do not need to write the address.
[单项选择]
Escaping from the Earth
The Earth has a force that pulls things toward itself. We call this force gravity(地心引力). This is something we live with all the time, and we take it for granted and hardly ever think about it. But it is a most important factor in rocket operation and must be overcome if we are to get anywhere in space, or off the ground at all.
Take the throwing of a hall as an example. The harder the ball is thrown, the faster and higher it will go. What is the secret Its speed. If we could throw the ball hard enough it would go up and up forever and never come down. The speed at which it would have to be thrown to do this is known as escape speed. Of course, we cannot throw a ball hard enough because the speed required to escape completely from the Earth’s gravity is seven miles per second, or over twenty-five thousand miles per hour.
Once escape speed has been reached by a spacecraft(宇宙飞船), no further power is needed. A rocket aimed
A. Few spacecrafts complete their flight operations.
B. The Earth’s gravity cannot be overcome.
C. No future power is needed after the escape speed is reached.
D. "Free fall" takes the place of the Earth’s gravity pull.
