搜题请搜索小程序“爱下问搜题”
问题 选择题

下列除哪项外，均是生物多样性的内容 (    )

A．基因的多样性

B．变异多样性

C．物种的多样性

D．生态系统多样性

答案

答案：B

该题考查的是生物多样性的内容，生物多样性包括：物种多样性、遗传多样性（基因多样性）、生态系统多样性。

改错题

修改病句。   

1．动物园的爬行馆里展出各种蛇和许多鸟。

                                                                                                                                                          

2．我爱吃苹果、香蕉、黄瓜等水果。   

                                                                                                                                                       

3．农贸市场里有黄瓜、冬瓜、西瓜、南瓜等许多蔬菜。   

                                                                                                                                                       

4．大扫除时，班干部和男同学抢着干重活，让女同学干轻活。  

                                                                                                                                                        

5．《三国演义》是我国的四大名著。   

                                                                                                                                                       

6．我和李明一前一后肩并肩地走进了学校。   

                                                                                                                                                       

7．姐姐光荣地被评为“模范青年”的称号。 

                                                                                                                                                         

8．今天晚上，我一定非要把家庭作业做完。  

                                                                                                                                                      

9．这个学期，我们班参加学雷锋活动的大约有三十多人。 

                                                                                                                                                      

10．我的抽屉里堆满了许多获奖证书。 

                                                                                                                                                      

11．班会上，小明和小伟分别发了言，大家都同意他的说法。 

                                                                                                                                                      

12．瞧，这灯亮些，可以把这个昏沉的小蜡烛熄了。

                                                                                                                                                      

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单项选择题

在编制预算定额时，对于那些常用的、主要的、价值量大的项目，分项工程划分宜细；次要的、不常用的、价值量相对较小的项目则可以放粗，这符合预算定额编制的（）。

A.平均先进性原则

B.时效性原则

C.保密原则

D.简明适用的原则
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