搜题请搜索小程序“爱下问搜题”
问题 选择题

下列有关种群、群落的叙述，正确的是[ ]

A．稳定型的种群个体数量在近期内保持不变

B．捕食关系对维持群落的相对稳定有重要作用

C．植物群落的水平分布与地形无关

D．人类活动不会改变群落演替的方向和速度

答案

答案：B

单项选择题

患儿，男，12岁。患流痰3年，溃口位于左腰部，脓水稀薄，夹有败絮样物，伴有午后潮热，夜间盗汗，口燥咽干，咳嗽痰血，舌红少苔，脉细数，内治应首选

A．阳和汤

B．知柏地黄丸

C．清骨散

D．人参养荣汤

E．六味地黄丸
查看答案
单项选择题

Woman: Mr. Scott came back from L. A. very late yesterday. Man: So, even if he had been able to attend the party, he would have arrived late. Question: What do we learn about Mr. Scott

A．Mr. Scott was late for the party.

B．Mr. Scott didn't attend the party at all.

C．Mr. Scott attended the party.

D．Mr. Scott did not like attending parties.
查看答案