花椒属、柑橘属和黄檗属在主要形态特征和用途上有何不同？

风险是一个事前概念，损失是一个事后概念，两者有着本质的区别。 ( )

阅读理解。

     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。其中有两项为多余选项。

     __ 1     

     What would you be like if you were to take the college entrance exam tomorrow?    2 _Or, worried

and uneasy?

     "I was surprised at how I could get angry so easily with my parents before a big exam, " said a senior

3 student Wang Yangqian from Beijing. "I couldn't fall asleep even after I'd been in bed for two hours."

     Not only exams but also other things, like a big game, can make you different from how you are

usually. You may act differently because you are stressed out. What is stress?    3     Usually your hands

get wet and your heart beats faster. You feel stressed because you might ask too much of yourself

sometimes. Or, your parents, teachers or classmates put too much pressure on you. This can make you

worried. But being stressed is not always a big problem. Everybody, even sports stars, can get a little

worried before a big game.

     Some kinds of stress are good. Good stress might show up when you' re called on in class or when

you have to give a report.    4     You may do a better job in your book report if the anxiety pushes you

to do more work before you read it to the class.

     Sometimes stress can turn into something bad if you keep having stressful feelings for a long time.This

kind of stress isn't going to help you.It can make you sick.   5    

     Remember to stay relaxed.It won't be the end of the world, even if you don't pass the exam.

A. Peaceful and happy as usual?

B. This kind of stress can help you get things done well.

C. Stress can push you to meet your deadline.

D. Stress can be good or bad for people.

E. You may feel stressed when you ask for too much help.

F. It can also prevent you from working harder.

G. Stress is what you feel when you are worried or uncomfortable about something.

岗位十项制度的核心是交接班制。

可以实行按月预支工程款的工程结算方式有( )。

A．按月结算

B．分段结算

C．分项结算

D．按季度结算

E．竣工后一次结算

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