胃短动脉起源于A．胃左动脉 B．胃右动脉 C．脾动脉及其分支 D．胃、十二指肠动脉

简述封油系统式运步骤？

Many students want to find friends on the Internet as a way of practising their language skills and learning more about new cultures. Traditional pen pals were the primary source for such contacts, and students could write each other letters. With the Internet, finding friends has become much easier, and such relationships are called key pals.

However, care and consideration should be given when finding friends on the Internet:

◎Search the Internet for reputable(有信誉的) services. Look for reviews of such sites to learn more about other students’ experiences. Don’t join a service until you have done your research.

◎Check to see if you can use a nickname, instead of ___2_______, to protect your identity.

◎Never give personal information to anyone, including your home address, phone number, and birthday.

◎Stop contact with others if you feel uncomfortable with the topics of conversation. Again, if you protect your identity, this will be easier to do. Tell your teachers, parents, or even local law enforcement if problems arise.

◎Try to use the language you are studying in the classroom in your communication with others.

◎Ask appropriate questions that will also help you learn about other cultures. Remember that someone’s personal experience might help you to understand a whole culture. You have to talk to many different people, and this will get you started.

小题1:Please give this passage a proper title. (Please answer within 10 words.)

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小题2:Please fill in the blank with proper words. (Please answer within 5 words.)

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小题3:Which sentence in the passage is the closest in meaning to the following one?

    Pen friends used to write letters to keep in touch with each other.

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小题4:Why do many students want to find friends on the Internet?

(Please answer within 25 words.)

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小题5:The word “that” in the last paragraph refers to        . (Please answer within 5 words.).

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患者男性，38岁，因上腹部被强力挤压6小时就诊，上腹部持续性疼痛，并向右肩部放射，伴有恶心，呕吐2次。体格检查：体温38.8℃上腹部明显压痛、肌紧张，反跳痛（±），移动性浊音（-），肠鸣减弱。辅助检查：血常规：白细胞17.9×10⁹／L，中性粒细胞0.89。

为明确诊断首选的检查是（）

A.生化检查

B.电子胃镜检查

C.腹腔穿刺液淀粉酶测定

D.尿淀粉酶测定

E.血淀粉酶测定

烟气焓

防止锅炉汽水共腾的方法，除了加强锅炉操作管理外，还必须（）。采用锅内加药处理时，必须注意控制加药量，尤其是（）更需注意。