问题
填空题
如果x：y=4：5，那么______×4=______×______．
答案
因为x：y=4：5，
所以y×4=x×5．
故答案为：y，x，5．
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如果x：y=4：5，那么______×4=______×______．
因为x：y=4：5，
所以y×4=x×5．
故答案为：y，x，5．
 Stress is the feeling you get when you’re really worried about something. This is the kind of worry that troubles you for hours, or 1 days. It makes you feel blue, scared or angry. You may find it 2 to eat and sleep, or you might eat and sleep much more than usual. Too much stress is bad for you. Stressing out can lead to serious 3 like heart illnesses. But a moderate (适度的) amount of stress keeps your body and 4 alert (警觉的) and can make your performance better, like when you are doing a presentation to your class or 5 to the finishing line. But, if you are seriously stressed out, look at these quick and easy ways to 6 . Firstly, you can go for a run, play tennis or ride your bike for a while 7 exercise produces more beta-endorphin(B-内腓) that controls stress. Secondly, having a good 8 is very important. You should try to get at least eight hours of sleep every night. Thirdly, eating a healthy, balanced diet that 9 all the food groups will help. Also, you can talk to the people you trust . Keeping your feelings inside may make the situation 10 while talking to a person you trust may make you feel better. They may be able to give you advice and help you solve your problem.
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