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>> 国家开放大学 / 土木工程力学（本）
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佳题速递：
正弦量的三要素是指它的最大值、角频率和相位。(A)对(B)错[参考答案：B] 分值：5得分： 分 尤政威批改于2020年6月16日 21点57分 电路理论 为了有效地把自己对教育内容的理解转化为学生的知识和有效地解决教育教学中出现的问题，教师需要有 现代教育理论 根据我国《专利法》，实用新型和外观设计专利权的保护期限为自专利申请之日起（ ）(A) 5年 (B) 10年 (C) 15年 (D) 20年经济法 教室にだれも？。 日语 题型描述: 阅读理解A credit card is basically a plastic card with a magnetic strip（磁条） invented with the intention to simplify the complicated banking process for an individual in case he/she is short of cash. Many people don’t like to carry much cash. For them the cards are convenient and safe to use.Credit cards are gaining popularity, even for buying small items. They are accepted almost everywhere, though not at fast food restaurants.A credit card enables the cardholder to buy things now and pay for them later. The cardholders get credit by promising to pay in the future for something they receive in the present. When the cardholder uses a credit card, the credit card company that issued the credit card pays the store. Later, a bill will be mailed to the cardholder by the credit card company for the amount he/she purchased. And finally, the cardholder then repays the company for the entire credit amount that he/she has used, by paying it back fully or through regular monthly payments. In case the cardholder fails to payback the entire balance, the bank can lawfully charge him/her with an interest fee on the unpaid amount. (193 words)1、 Which of the following can be true of the credit card? A. Both A and B. B. People using credit cards are never discredited. C. It allows the cardholder to buy things without cash. D. It is a plastic card. 2、 Why are the credit cards so popular? A. They are accepted in many places and can be used to buy both large and small items. B. Many people like to carry both credit cards and a lot of cash. C. Both A and B D. They are easy to carry though not very safe. 3、 What is the advantage of a credit card? A. The credit card is accepted in fast food restaurants. B. Since the credit card company sometimes pays the store, the cardholders do not have to pay at all. C. The more the cardholder buys, the better his/her credit is. D. When the cardholder does not have the money, he/she can still buy things. 4、 9. When a cardholder receives a bill from his/her credit card company, how can he/she repay immediately? A. A small part of the bill. B. Any of the above. C. In full. D. By half. 5、 What may happen if the cardholder fails to pay back the entire balance? A. The cardholder must pay the interest fee. B. The cardholder pays double the amount of the original bill. C. The cardholder has to register with the credit card company again. D. The credit card will become useless.统考英语B 0.1 mol/L弱酸HA溶液（Ka=1.0×10-5）中浓度最小的组分是( ) A、 H+ B、 HA C、 OH— D、 A—无机化学与分析化学
