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链霉素鉴别反应为
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我国某出口货物的CIF价为200美元/件，已知该商品的保险加成率为10%，保险费率为1%，试计算该商品的保险费。(计算结果保留1位小数)
奋乃静的含量测定采用
It is not polite to arrive at a dinner party more than 15 to 20 minutes late. The host or hostess usually waits for all the guests to arrive before (36) the meal. If someone is late, the food may be spoiled, and so might the host or the hostess (37) . If you have to be late, call and tell them to (38) you. It’s even (39) to be early! The host or the hostess will probably not be (40) .If you are early, drive or walk around the block a few minutes, or just sit in your car (41) the right time. Though it’s often important to arrive on time, yet (42) , for open houses, the host or the hostess invite guests to arrive and leave (43) a certain time so you can arrive at any time (44) the time he or she gives you.It’s nice to bring an empty stomach, but it’s even nicer to bring a small present. The present should not cost (45) , or you might embarrass the host or hostess. Flowers, wine, or a box of (46) will be fine.Never bring money as a present. In an introduction, the order of a name: the given name, the family name. In other words, the given name comes (47) It’s important not only to learn and remember names, but to (48) them often in conversation. After the (49) , we usually call friends by their given names. (50) may want you call them by their titles and (51) 1) such as "Mr. Jones", "Mrs. Smith", "Ms. Johnson" or "Dr. Brown".A maiden name is a woman’s family name at birth. In the United States and Canada, after a woman marries, she (52) the family name of her husband (53) her maiden name. It is now becoming common, (54) , for women to keep their maiden names (55) they get married. 48().
盐酸麻黄碱鉴别试验所采用的试剂是
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