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>> 国家开放大学 / 教师礼仪
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佳题速递：
K 公司的产品价格为60元，如果K公司产品的贡献为价格的30%，那么它的平均可变成本是（ ）。 A、 18 B、 22 C、 32 D、 38管理经济学 欲证明集合S上运算○能够构成独异点，不需要验证○在S上具有零元。 A、正确 B、错误离散数学（下） 下列不是病毒预防手段的是 A. 定期检查、准备系统启动盘 B. 数据常常备份、U盘专机专用 C. 慎用网络下载软件 D. 拒绝电脑连网 计算机统考 下列各型号中属于优先编译码器是（ ）。 数字电子技术 2、
技术经济分析的目的,燃气输配 题型描述: 十选项完形填空It is always interesting to visit another country, especially for those who have never traveled a great deal. Foreign _ _ _ _ can be very educational for anyone if he is interested enough to make preparations beforehand. Learning the language of the new country would be difficult for the traveler, _ _ _ _ the benefits of such an effort would become obvious immedi?ately _ _ _ _ his arrival. It may not seem important to him when he comfortably stays at home, but knowing how to _ _ _ _ a meal or book a room is necessary for the newcomer in a strange country. Without knowing the language, it is very difficult _ _ _ _ the stranger to understand the people of the new country and their customs.Of course, in our small world it is often possible to find someone _ _ _ _ understands our own, but this is only second-best for the traveler. To be sure, he can see places and things _ _ _ _ the use of a language, but places and things _ _ _ _ not the heart of any coun?try. To get the greatest benefit from a trip _ _ _ _ another country, it is how important for the visitor to _ _ _ _ an understanding of the language.1、 A. travel B. country C. language D. people 2、 A. when B. but C. so D. and 3、 A. while B. before C. at D. on 4、 A. - B. buy C. book D. order 5、 A. in B. of C. to D. for 6、 A. which B. whom C. where D. who 7、 A. that B. with C. without D. by 8、 A. is B. were C. had D. are 9、 A. to B. of C. on D. in 10、 A. has B. have C. having D. had统考英语B