问题 问答题

简述植被分布的水平地带性、垂直地带性及其相互关系。

答案

参考答案:山体的植被垂直带,是反映山体所处的一定纬度和一定经度的水平地带性的特征。植被垂直地带性是从属于水平地带性的特征,在水平地带性和垂直地带性的相互关系中,水平地带性是基础,它决定着山地垂直地带的系统。体现经度地带性的山体垂直带的组成情况,还与该经度地带所处的纬度有一定的相关性。经度起点的植被垂直带,向上首先变为同纬度的海洋性植被(即近海洋处同高度的植被类型),而后,随着海拔的升高,出现与纬度地带性相应的植被带。如高山是处于热带的荒漠地区,则山麓平地的地带性的植被类型为干荒漠,随着山地的上升,依次的理想分布为干草原(或稀树草原)→疏林灌丛→常绿阔叶林→夏绿林→亚高山针叶林→高山灌丛→高山草地→高山冻原→冰雪带。

选择题
完形填空

第二节 完形填空(共20小题,每小题1.5分,满分30分)

Mr. and Mrs. Jones’ house was full of suitcases, packages and packed-up boxes. The two of them were ___36___with pencils and paper, ____37____their luggage, when there was a ____38____ at the door. Mr. Jones went to ____39____ it and saw a well-dressed middle-aged lady outside. The lady said that she lived in the house ____40____ theirs, and that she had come to ____41____ them to their new home.

The Jones invited her in, after ___42___ for the state of the house.

“Oh, ___43___,” she answered. “Do you know in some parts of this ____44___ neighbors are not all ___45___? There are some streets where people do not ___46___ their neighbors, ____ 47____ their next-door ones. ___ 48___ in this street everybody is friends with ____49___ else. We are one big, happy family. I’m ___50____ that you will be ___51___ here.”

The well-dressed lady got a ___52___ when she came to visit the house the ____53___ time, because she found a quite ____54____ man and woman in it. Mr. and Mrs. Jones had not had the ____55___ to tell her that they were not the new owners of the house, who were to move in the next day, but the old ones, who have lived beside her for two years without ever having visited her or even noticing her existence.

36. A. free         B. busy        C. satisfied    D. familiar

37. A. checking     B. examining    C. testing     D. enjoying

38. A. sound       B. ring         C. friend      D. message

A. answer      B. serve        C. see        D. guess

A. above       B. of          C. under       D. beside

A. welcome    B. lead         C. take        D. invite

A. explaining   B. apologizing   C. showing    D. asking

A. excuse me   B. here you are  C. never mind   D. thank you

A. house       B. street       C. town        D. time

A. busy        B. lonely      C. safe         D. friendly

A. know       B. understand   C. welcome     D. respect

A. merely      B. even        C. mostly      D. neither

A. And        B. But         C. Otherwise    D. While

A. anybody    B. nobody       C. somebody    D. none

A. uncertain   B. glad          C. sure         D. afraid

A. happy      B. lonely        C. popular     D. friendly

A. surprise    B. fright         C. pleasure      D. worry

A. first       B. exact         C. next        D. same

A. famous     B. different      C. young       D. old

A. time       B. chance        C. courage     D. interest