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【简答题】
For centuries,the only form of written correspondence (通信)was the letters, letters were, and are, sent by some form of postal service, the history of which goes back a long way .Indeed, the Egyptians began sending letters from about 2000 BC,as did the Chinese a thousand years later. Of course, modern postal service now are much more developed and faster, depending as they do on cars and planes for delivery. Yet they are still too slow for some people to send urgent documents (紧急文件)and letters. The invention of the fax (传真) machine increased the speed of delivering documents even more. When you send a fax,you are sending a copy of a piece of correspondence to someone by telephone service. It was not until the early 1980s that such a service was developed enough for businesses to be able to fax documents to each other. The fax service is still very much in use when copies of documents require to be sent ,but, as a way of fast correspondence, it has been largely taken the place of by email ,Email is used to describe messages sent form one computer user to another. There are advantages and disadvantages with emails. If you send some one an email , then he will receive it extremely quickly .Normal postal services are rather slow as far as speed of delivery is concerned. However, if you write something by email, which you might later regret ,and send it immediately, there is no chance for second thoughts. At least, if you are posting a letter you have to address and seal(封)the envelope and take it to the post box.There is plenty of time to change your mind .The message is think before you email! 41.We can learn from the text that__________. A.email is less popular than the fax service B.the postal service has over the years become faster C. the postal service has over the years become slower D. the fax service has a history as long as the postal service does 42.It can be inferred from the text that_________. A. the fax service had been fully developed by the 1980s B. letters have been used in China for about 1,000 years C. the fax machine was invented after the 1980s D. letters have been used in Egypt for about 2,000 years 43.In the last paragraph, the writer mentions 'think before you email' to show that________. A. you may regret if you don’t your envelope        B. you may regret before you send something by email C. you’d better not send your email in a hurry     D. you need plenty of time to send an email 44.The text mainly deal with_________. A. the progress in correspondence                      B. the advantage of fax machines C .the advantage of emails                                 D. the invention of fax machines
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举一反三
【单选题】抗菌药物联合用药目的不包括
A.
提高疗效
B.
扩大抗菌范围
C.
减少耐药性的发生
D.
延长作用时间
E.
降低毒性
【单选题】《旧金山和约》规定了日本附近太平洋海域的北纬()度以南地区属于美国的战略托管区。
A.
22
B.
25
C.
29
D.
30
【简答题】在分子或离子 中,中心原子以sp2 杂化成键的有( ),以Sp3 杂化成键的有( )。
【单选题】抗菌药物的联合应用原则不包括( )
A.
原因不明的严重感染
B.
单一抗菌药不能控制的严重感染
C.
需长期治疗,但病原菌易产生耐药性的感染
D.
可增加药物的毒性作用
【多选题】联合用药可以增强疗效,减少肿瘤药物产生耐药性,其基本原则包括
A.
药物毒性不重叠
B.
应包括2类以上作用机制不同的药物
C.
周期非特异性药物与周期特异性药物配合
D.
药物联用应协同、不拮抗
E.
各个药物使用采用合理的顺序
【单选题】联合用药的目的不包括
A.
为了达到多种预防治疗目的
B.
利用药物间的协同作用提高疗效
C.
利用药物间拮抗作用减少不良反应
D.
促进药物销售
E.
减少单个药物应用剂量,以降低单药毒性反应的发生率
【简答题】定义两个浮点型变量m,n;然后分别赋予98.67和2.34,在屏幕上打印出“m-n=96.33”字样
【简答题】定义两个浮点型变量m,n;然后分别赋予98.67,2.34,在屏幕上打印出“m-n=96.33”字样。
【简答题】(10-3) 与 Java 基本类型对应的类称为( )类,把基本类型转换为对象类型称为( ),把对象类型转换为基本类型称为( )。
【单选题】联合毒性作用不包括( )
A.
相加作用
B.
加强作用
C.
拮抗作用
D.
互补作用
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