第12题: [单项选择]下面关于PC机串行通信接口的叙述中，正确的是( )。 A. 异步通信时，一帧信息以起始位开始、停止位结束，起始位之后是数据的最高位 B. 系统A和系统B以半双工方式进行串行通信时，数据能从A传送到B，也能从B传送到A，并且可以同时进行 C. PC机的串行通信接口采用同步通信方式 D. PC机的串行通信接口采用RS-232标准 参考答案:D
第22题: [单项选择]有关室间隔缺损的手术治疗，下列不恰当的是（）。 A. 室间隔缺损的大小和位置是决定手术选择的重要依据 B. 有的病例可选择介入治疗 C. 巨大室间隔缺损应尽早手术 D. 室间隔缺损合并呼吸系统疾病不是手术绝对禁忌证 E. 一期解剖修复是所有室间隔缺损的唯一手术选择 参考答案:E
第26题: [简答题]Topic When do you think is the best time for a college candidate to decide on his major: before going to college or while enrolled in college Provide your reasons and supporting details. 参考答案:[参考范文]
Best Time to Decide on Your Major
In China，due to the conventional education system，college candidates have to decide OD their major a few days after the Entrance E．xamination for college，with advices from concerned parents and high school teachers．It is a little too early in my way of thinking as a serious decision for a 17 or sotomake． Friends of mine--college survivors，admitted their ignorance of the future majors back then though they’d made the choice．First thing on their mind was to fill out the application forms by the date of submission，which made the difference between majors like Heat Energy&Power Engineering and Heat&Electrical Engineering less important，plus there must be chances to transform to other fields even after leaving school．There were many others who took the decision really serious；they spent days on searching information about the available subjects，and asking those who’d been there for advices．but this didn’t always 1ead to a successful choice，six-year middle school experience might has focus their sights completely on the entrance examination，and working adults tended to talk the college candidates into hot majors，such as international trade， business administration though they had no right to decide on other’s choice． A relatively mature attitude should be formed when it comes to making life choice，to stop hasty decisions made in the Black July each year．It iS more reasonable for the candidates to decide on their maj or while enrolled in college where there are professional advisers who know about all the academic programs and are dedicated to helping students，and when you have some real idea for your future career．
