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第二节 完型填空 阅读下面短文，从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳选项。 Many students do not like to study history. They say that there are (41) many names and dates to 42 But if we do not know about the (43) , we can not understand the present well. For example, if we wish to know how men (44) to use fire, we have to know what men did (45) the past to travel at night or to keep themselves (46) in cold nights. Only a study of history will make us realize(意识到) (47) everything we do today is the result of what (48) people did in the past. As we (49) history, we learn many interesting (50) .History helps us understand our present life better. (41)A.
too
B.
enough
C.
nearly
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【简答题】为什么说解决能源问题与环境保护离不开燃烧研究?
【单选题】当a=4,b=5,c=7,d=6时,执行下面一段程序: if(a if(c else if(a if(b else x=3; else x=4; else x=5; 程序执行后,x的值为( )。
A.
3
B.
4
C.
1
D.
2
【单选题】当a=1,b=3,c=5,d=4 ,执行完下面一段程序后x 的值是 : if(a if(c else if(a if(b else x= 3; else x=6; else x=7;
A.
1
B.
2
C.
3
D.
6
【单选题】当a=4,b=5,c=7,d=6时,执行下面一段程序: if(a if(c else if(a if(b else x=3; else x=4; else x=5; 执行后,x的值为( )。
A.
1
B.
2
C.
3
D.
4
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