表征天线性能的主要参数有输入阻抗、方向性图、增益、驻波比、()等。 A.架设高度 B

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问题:

表征天线性能的主要参数有输入阻抗、方向性图、增益、驻波比、()等。

A.架设高度

B.通信距离

C.极化方式

D.构造材质

考点:民航电信人员执照考试航空电信人员综合试题航空电信人员综合试题题库
题型:单项选择题

Growing mushrooms(蘑菇) is probably the easiest thing you can do even if you are new to mushroom growing. It is becoming more common because restaurants are starting to create more dishes that include mushrooms.

Mushroom growing is easy. To start, you need to have a space where you are going to grow these mushrooms. It does not have to be a huge space but just enough for you to grow as many mushrooms as you need. When you have found the space perfect for you, you can start researching what kind of mushrooms you want to grow. There are a lot of mushrooms to choose from and not all of them are suitable to eat.

When you decide what kind of mushrooms you want to grow, you can start getting ready to plant the mushrooms. Sometimes you may want to hire some workers to help if you have a large mushroom farm, or if you are trying to start a professional mushroom growing business. Trying to have a business by yourself can be stressful. If you don’t have enough time to spend taking care of everything yourself, dome helpers may be the best choice.

After you have started the mushroom growing, you should regularly check that your mushrooms grow properly and that they are not being attacked by any pesticides(农药) or any other animals or something that could be dangerous to them. That is the worst part of mushroom developing. Protect your mushroom farm well with a fence(围栏) or a gate so that only you and your workers can get in and out.

Mushroom growing is not difficult and it is easy to get stared in the world of farming. You will soon possibly be able to provide some of the great cooks of the world with high quality mushrooms that will be enjoyed by thousands of people all over the world.

小题1:According to the passage, many people begin to plant mushrooms probably ________.

A.because they are in great need.

B.because they look very beautiful

C.because they are healthy food

D.because they are very expensive小题2:Which of the following is the right order of planting mushrooms?

a. Choose suitable mushrooms.

b. Protect your mushrooms well.

c. Find some workers to help you.

d. Start to grow the mushrooms.

e. Find a place to plant your mushrooms.

A.c—a—d—b—e

B.e—a—c—d—b

C.c—a—e—b—d

D.e—a—d—b—c小题3:It can be inferred from the passage that __________.

A.pesticides can be used in mushroom growing

B.anyone can produce high quality mushrooms.

C.after starting, you should always take care of the mushrooms

D.having a mushroom business is not so difficult小题4:The best title of the passage is __________.

A.Healthy mushrooms

B.The value of mushrooms

C.How to choose mushrooms

D.Suggestions on growing mushrooms

题型:单项选择题

(11分)阅读材料,回答问题。

经过10多年的快速发展,中国已成为全球电动自行车的制造、消费大国,同时电动自行车也是中国老百姓主要的交通工具。电动自行车制造成本低,售价一般在两三千元左右;使用成本较低;而且电动自行车是一种绿色环保交通工具,尤其对城市短途出行的人群最为合适。

结合材料,从经济生活的角度,分析电动自行车成为老百姓主要交通工具的原因。(11分)

题型:单项选择题

将十进制数24转换自二进制数,结果为下列何值

A.(A) 10100

B.(B) 10010

C.(C) 11000

D.(D) 100100

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为了评定观测成果的精度,我国通常以()、()、()等作为评定观测成果精度的标准。

题型:单项选择题

资产、负债、利润三项会计要素,表现资金运动的相对静止状态。 ( )

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