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【单选题】
What is a global command?（）A.
a command that is set once and affects the entire router
B.
a command that is implemented in all foreign and domestic IOS versions
C.
a command that is universal in application and supports all protocols
D.
a command that is available in every release of IOS, regardless of the version or deployment status
E.
a command that can be entered in any configuration mode
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【单选题】— Look! There ________! — Oh;yes,there __________ ! [ ]
A.
comes Tom;comes he
B.
Tom comes;he comes
C.
Tom comes;comes he
D.
comes Tom; he comes
【单选题】Tom likes fish very much. He often buys some fish in the shop and takes it home. But when his wife sees the fish, she says to herself, “Good! I can ask my friends to have lunch, and we can eat the fis...
A.
Tom
B.
Tom’s wife
C.
The cat
D.
Tom’s wife and her friends
【单选题】广义笛卡尔积属于关系运算符中的(40)。两个元数分别为n目和m目的广义笛卡尔积是一个(41)列的元组集合，其形式定义如下：(42)＝(43)。
A.
集合运算符
B.
专门运算符
C.
比较运算符
D.
逻辑运算符
【简答题】阅读理解 Tom is a young man.He has a very big dog and he has a very small car,too.He likes playing tennis. Today he plays tennis for two hours at the club and then he wants to go home by car.His dog comes...
【简答题】阅读理解,根据短文内容,判断下列句子正(T)误(F)。 Every Saturday Tom goes to the park and plays s with his friends. And he comes home at twelve thirty for his luch. But today a car stops at his house at twelve o'clock....
【简答题】阅读理解 Tom is a seaman. He is always drunk（喝醉）. One day Tom goes to a new city. He drinks very much in a bar that night. When he goes out of the bar，he sees a man lying in the street. The man is quite d...
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