题干

每年的五、六月份,枣树林里都会引来大量的蜜蜂飞舞,据你的观察和对所学知识的理解,下列哪一项说法符合科学的事实(  )

A:枣树的花是靠风力传粉的,有风的天气助于花粉传播

B:枣树可以结出颜色鲜艳的大花朵,借此招引昆虫

C:枣树的花为单性花,可以完成自花传粉

D:蜜蜂被枣花分泌的花蜜所吸引,在采集花蜜的同时可以帮助枣花完成传粉

上一题 下一题 0.0难度 选择题 更新时间:2017-06-07 12:37:09

答案(点此获取答案解析)

D

同类题3

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项。

    It's normal that people sometimes feel nervous. Everybody gets stressed from time to time.____ Some ways of dealing with stress 一like screaming or hitting someone一don't solve (解决),much. But other ways, like talking to someone you trust, can lead you to solving your problem or at least feeling better.

    Four steps for fighting stress, try taking these four steps, the next time you are stressed:

1) Get support. When you need help, reach out to the people who care about you. Talk to “trusted adult, such as “parent or other relatives. ____ They might have had similar problems, such as dealing with a test, or the death of a beloved pet.

2) Don't take it out on yourself. Sometimes when kids are stressed and upset they take it out on themselves. Oh, dear, that's a good idea. Remember that there are always people to help you. Don't take it out on yourself. ____

3) Try to solve the problem. After you're calm and you have support from adults and friends, it's time to get down to business. ____ Even if you can't solve it all, you can solve a piece of it.

4) Be positive. Most stress is temporary(暂时的).Remember stress does go away, especially when you figure out the problem and start working on solving it. These steps aren't magic, but they do work. And if you can stay positive as you make your way through a tough time, you'll help yourself feel better even faster.____

A. Ask for a helping hand to get you through the tough situation.

B. Notice your friends' feelings and find a way to help them.

C. Different people feel stress in different ways

D. Ah, it feels so good when the stress is gone.

E. You need to figure out what the problem is.

F. And don't forget about your friends.

G. Then, find a way to calm down.