印尼爪哇附近岛屿上的克拉卡托火山,于1883年的5月至8月连续喷发,使岛上覆盖了厚达

题型:单项选择题

问题:

印尼爪哇附近岛屿上的克拉卡托火山,于1883年的5月至8月连续喷发,使岛上覆盖了厚达30米的火山回合熔岩,导致所有生物全部毁灭,但半个世纪后岛上重现原有的生机勃勃景象,这种现象属于( )。

A.原生演替

B.次生演替

C.陆生演替

D.内因演替

考点:专升本考试生态学基础专升本生态学基础
题型:单项选择题

阅读理解。

      If you have come into a chat room, or sent e-mails to or received e-mails from your net friends, you

have become one of the millions who talks to others in a different and short form of English.

     All over the world, every night children and the elder are "talking" online, and many of them are talking at the same time.

     If you want to talk fast, you need to use the language which is easy to understand. There is neither time nor space for you to tell others why. Why not just use I3RB (=be right back) to tell your friends you have

to leave for a moment?

      If you are interested in somebody,  A/S/I.is OK. It means you want to know your friend's age,  sex,

and location ( = place). You may get 18/F/ BJ as an answer. If something makes you laugh, say you are

OTF, or LOL (=laughing out loud).

     People want to write as fast as possible.and they want to get their ideas across as quickly as they can. Big letters are not often used, except when telling feelings, as it takes more time to hold down the "shift"

key and use capitals.Punctuation is going, too.

1.When people are online,they talk by_______.

A using body language a lot B. drawing some strange pictures

C. making phone callsD. making use of a different form of English

2.The net makes it possible for many' people in the world to_______ .

A.talk online at the same time

B.find their friends and relatives

C.pick out good things to buy

D.find out some problems in society

3.The sentence "There is neither time nor space for you to tell others why."

means that _______.

A. people should use the right words

B. people should know what time it is when they are talking

C. people online have to speak in an easy way

D. people should tell each other what they think about in a funny way

4.If you get 18/F/BJ as an answer to your A/S/I., it means_______.

A. the person who is talking to you is 18 from Beijing and he is high

B. you are talking to a boy 18 years old and he lives in Beijing

C. the girl you are talking to is 18 years old and she lives in Beijing

D. the Beijing girl you are talking to has been online for 18 minutes

5.Which is a way to save time online?

A. People do not use big letters and punctuation quite often.

B. Some people use pictures.

C. People don't write just using the keyboard.

D. People never use the "shift" key.

题型:单项选择题

咽鼓管的生理功能是()

A.保持中耳内外压力平衡

B.传音作用

C.引流作用

D.防声作用

E.防止逆行性感染的功能

题型:单项选择题
下列尺规作图的语句错误的是(  )
A.作∠AOB,使∠AOB=3∠α
B.以点O为圆心作弧
C.以点A为圆心,线段a的长为半径作弧
D.作∠ABC,使∠ABC=∠α+∠β
题型:单项选择题

Mike likes playing ________ guitar after ________ breakfast. [ ]

A. the, the    

B. a, a        

C. the, a        

D. the, ×

题型:单项选择题

在设备监理合同中,( )是编制设备监理规划的基本界限。

A.监理机构和监理工程师的授权与义务

B.设备监理合同对监理效果的要求

C.监理的工作范围和监理内容

D.设备工程项目承包合同

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