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问题 单项选择题

下列有关生物进化的叙述错误的是（）

A.种群基因频率的定向改变是形成新物种的前提

B.自然选择的实质是选择种群的有利基因，决定了新基因的产生

C.新物种的形成意味着生物能够以新的方式利用环境条件

D.受农药处理后种群中抗药性强的个体有机会将基因传递给后代

答案

参考答案：B

填空题

对于湿热病的治疗，叶天士《温热论》中提到：“救阴犹易，通阳最难，救阴不在血，而在津与汗，通阳不在温，（）”
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填空题

根据汉语提示完成句子。

1. We often go to school ______ (步行).

2. I am planning to travel to some ______ (名胜) of China.

3. You mustn't ______ (指向) anything with your foot.

4. I hope you all ______ (玩得愉快) at the party.

5. I hope to ______ (聚会) with my old friends in the winter holiday.

6. Jane will ______ (返回) to Canada next month.

7. They often wear scary clothes to ______ (敲打) their neighbors' doors.

8. People in many countries give ______ (互相) presents.

9. In spring, the weather gets warm, and many things ______ (苏醒) in March.

10. People start ______ (为……准备) the festival a month before.

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