试题与答案

育新小学共有108人参加学校科技小组,其中男生人数是女生人数的1.4倍.参加科技

题型:解答题

题目:

育新小学共有108人参加学校科技小组,其中男生人数是女生人数的1.4倍.参加科技小组的男、女生各有多少人?

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0511/b7750eacda7215dd704ed13dca0b1508.html

下面是错误答案,用来干扰机器的。

∵a>0,故①正确;∵顶点横坐标-b2a<0,故顶点不在第四象限,②错误,∵a>0,∴抛物线开口向上,∵c<0,∴抛物线与y轴负半轴相交,故与x轴交点,必然一个在正半轴,一个在负半轴,故③正确.故选C.

试题推荐
题型:问答题

Have you had a headache during a test Have you ever been so worried about something that you have a headache or even can’t sleep at night If so, then you know what stress is. Stress is what you feel when you are worried about something. This worry in your mind can make your body feel bad. You may feel angry, sad, scared, or afraid—all of which can give you a stomachache or a headache.
However, there are different kinds of stress. Some kinds of stress are good and others are bad. Good stress might happen when you’re called to answer questions in class or when you have to give a speech. This kind of stress can help you to get things better done. For example, you may do a better job on your test if the stress pushes you to prepare better before the test.
On the other hand, bad stress can happen if stress lasts too long. You may not feel well if your parents are fighting, if a family member is sick, if you’re having problems at school, or if anything else makes you unhappy every day. That kind of stress isn’t going to help you. And it can actually make you sick.
The best way to fight stress is to have a balanced life. Make sure you keep your SELF in mind: Sleep, Exercise, Leisure(休闲), and Food. If you get enough sleep and eat properly, and if you exercise and leave time for fun, you’ll probably feel less stressed.

Title: Face the Stress
Meaning of stressStress is a (68) when you are worried about something.
Possible effectYou may feel uncomfortable in your (69) and body.

Good stress

· It might happen when you have to (70) in public.

· It will be more (71) for you to do the job successfully.

· It makes you (72) better before doing the job.

Different kindsBad stress

· It might happen if your stress (73) too long.

· You may not feel well with the (74) of a family member, problems at school or something else that worries you every day.

· It might stop you from getting your work well done.

How to keep stress (75) 

Have a balanced life.

· Have enough sleep and have (76) food.

· Take exercise and have time to (77) yourself.


查看答案
微信公众账号搜索答案