问题 选择题

下列说法中不正确的是(    )

A.遥感感知事物时不直接接触

B.遥感技术是遥感信息接收与应用的过程

C.遥感获取的信息是电磁波信息

D.遥感对地面不反射和辐射电磁波的物体无法感知

答案

D

本题考查遥感的概念、工作原理、技术环节等内容。遥感是利用传感器等技术装备,在航空器或航天器上通过接收和处理地面目标辐射或反射的电磁波而对地物进行感知的技术系统。由此可知A、B、C三项都正确。地面上所有物体都反射和辐射电磁波,没有不反射和辐射电磁波的物体,所以遥感探测的应用范围很广,应用价值很大,所以D项不正确。

选择题
阅读理解

Few people realize that there is a big difference between formal English and informal English. Formal English is used for most writing, and often in public speaking and formal meetings. It pays close attention to grammar rules, because if we use proper grammar, our meaning is often more precise. Also, on important occasions, we do not want to appear uneducated or to offend (冒犯) others, so we are very careful about how we speak. Informal English is used in speaking or writing to our friends and family. It often does not pay such close attention to grammar rules, because when we speak or write to them, we want our words to flow quickly. Also, with our friends and family, we are usually not so worried about appearing uneducated or about offending them by how we write or speak.

A big difference between formal and informal English is the use of contractions. A contraction is where we make a word shorter or where we put two words together and take away some of the letters. For example, instead of saying “do not”, many people say “don’t”. Using contractions in our speech is fine because it sounds natural, especially when we speak to our friends. In formal writing, however, contractions are usually avoided because people might think that you have made a mistake, or that you do not know proper grammar.

In the same way we might make words shorter, in informal English we often make sentences shorter as well. For example, if someone asks you your name, you will likely answer with one word: your first name. However, in formal English we usually use complete sentences. For example, we might write “My name is John”. In most speaking, we may not need to use every word in a sentence because the person we are speaking to will probably still understand us. In most writing, however, every word in a sentence must be written out in order to make sure that we can be understood.

小题1:When we use formal English, _______.

A.we will offend others

B.we will appear educated on important occasions

C.we needn’t pay more attention to grammar rules

D.we can express ourselves more directly and more quickly小题2:What’s the meaning of the underlined word “precise”?

A.clear

B.direct

C.puzzling

D.simple小题3:Contractions are best used when we are _______.

A.speaking at a formal meeting

B.speaking in public

C.speaking to our friends

D.writing an application (申请) letter小题4:In speaking, we do not always use complete sentences because ______.

A.we do not care about grammar

B.we do not want to sound stupid

C.we can still be understood

D.we don’t want to waste time