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请按下面注释的提示，将类B的构造函数定义补充完整。 classA int a； public： A(int aa=0) a=aa；； class B：public A int b； A c； public： //用aa初始化基数A，用aa+1初始化类对象成员c B(int aa)：______(b=aa+2) ；

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声明异常抛出用______子句来完成声明，它包含在方法的声明之中。

Many foreigners who have not visited Britain call all the inhabitants English, for they are used to thinking of the British Isles as England. (1) , the British Isles contain a variety of peoples, and only the people of England call themselves English. The others (2) to themselves as Welsh, Scottish, or Irish, (3) the case may be; they are often slightly annoyed (4) being classified as "English".Even in England there are many (5) in regional character and speech. The chief (6) is between southern England and northern England. South of a (7) going from Bristol to London, people speak the type of English usually learnt by foreign students, (8) there are local variations.Further north, regional speech is usually" (9) "than that of southern Britain. Northerners are (10) to claim that they work harder than Southerners, and are more (11) They are openhearted and hospitable; foreigners often find that they make friends with them (12) . Northerners generally have hearty (13) : the visitor to Lancashire or Yorkshire, for instance, may look forward to receiving generous (14) at meal times.In accent and character the people of the Midlands (15) a gradual change from the southern to the northern type of Englishman.In Scotland the sound (16) by the letter "R" is generally a strong sound, and "R" is often pronounced in words in which it would be (17) in southern English. The Scots are said to be a serious, cautious, thrifty people, (18) inventive and somewhat mystical. All the Celtic peoples of Britain (the Welsh, the Irish, the Scots) are frequently (19) as being more "fiery" than the English. They are (20) a race that is quite distinct from the English. Read the following text. Choose the best word(s) for each numbered blank and mark A,B,C or D on ANSWER SHEET Ⅰ.2（）

A. confine
B. attach
C. refer
D. add

多方人士 (30) 认为，由于明年经济增速可能继续下降，在居民资产价格缩水和收入增长放缓的压力 (31) ，汽车业的 (32) 不容乐观。

A. 普通
B. 普遍
C. 普及
D. 通常

I asked successful people what the secret of their success was. I (36)an early discussion with a vice president of a large oil company. "Oh, I just keep a To Do List," he said. I passed over that quickly, little (37) the importance of what he said. I was in another city the next day and I had lunch with a businessman who (38)owned the town. He was chairman of the gas and light company, president of five (39)companies, and had his hand in a dozen other (40). I asked him how he (41)to get everything done. "Oh, that’’s easy," he said. "I keep a To Do List." The first thing in the morning, he told me, he would come in and list what he wanted to (42)that day. He would arrange the items in (43). During the day (44). In the evening he would check to see how many of the items he had written down still remained undone and then give himself a score. (45). Again and again in the years since, when I have talked to successful people, the To Do List has come up. I have found that one difference between people at the top of the ladder and people at the bottom is that (46)____.