什么是咖啡因?

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问题:

什么是咖啡因?

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混凝土中水泥浆凝结硬化后起()作用。

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I believe that my country, Poland, is a perfect example for a place where food is particularly important. When we were little children, we began to understand how much a loaf of bread meant to our parents—to some it might sound silly but for me the custom of kissing bread before you started cutting it was simply amazing. It's not so common nowadays to treat food that way, since you hardly ever bake your own bread. Besides, everyone would call you crazy if you tried to kiss every bread roll before you ate them! But though we no longer make our food from scratch (起点), some customs have been kept--that's why I feel so sorry every time I have to throw any food away—even though I no longer live with my parents and nobody would blame me for this anymore!

Many people of our nation are still working as farmers, eating what they grow and harvest and therefore enjoying everything more. It's widely known that you value more anything that needs your effort in the first place. In most homes in Poland, especially those of farmers, the whole family would try and have their meals together--extremely difficult now, but so rewarding (值得) ! You can share other members' troubles and successes, give your children some attention, or just sit down for a moment instead of rushing through life aimlessly. Furthermore, your body, and stomach in particular will be very grateful (感激) for such a time!

In Poland, a wedding, Christmas or even a birthday is celebrated with a great meal. Women in the house get together and cook, sometimes for a few days before the event, and the extremely good or unusual food will be remembered and widely talked about.

You cannot over-value the importance of food in the country. What's more, almost everyone in Poland will be as interested in the topic as I am.

小题1:When the writer was a child, he / she ________.

A.found people were crazy about bread

B.began to realize the importance of food

C.thought that cutting bread was amazing

D.learned people hardly baked their own bread小题2:The writer feels very sorry when he/she has to throw away any food because

A.he/she makes food from scratch

B.his/her parents would blame him/her

C.some customs still have effect on him/her

D.many people are still working hard as farmers小题3: From the text, we can learn that, in Poland, ________.

A.most meals can be interesting topics for a long time

B.the whole family often have meals together nowadays

C.it's common for women to get together to cook for a few days

D.family members can know more. about each other by having meals together

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皮肤发生剪切力的常见原因包括()

A.痉挛

B.坐姿不良

C.卧姿不良

D.转移时滑动

E.摩擦

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患者男性,58岁。胸闷痛反复发作二年,加重一日,现胸闷如窒而痛,气短,喘憋,心烦易怒,咯黄痰,头昏沉,大便干,夜寐不安,舌暗红苔黄腻,脉滑数弦。

若病情迁延不愈,并出现心悸,喘促,不能平卧,动则甚,肢体浮肿,畏寒肢冷,舌淡,苔白滑,脉沉细。此时最佳方剂为()

A.参附汤加减

B.右归饮加减

C.左归饮加减

D.生脉散加减

E.真武汤加减

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防爆片工作时()。

A、自动启闭

B、手动恢复

C、超压自动爆破

D、可重复使用

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