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【单选题】
What is the purpose of a network mask?（）A.
It is used in conjunction with the wildcard mask to determine the number of hosts on a network
B.
It is used to define which parts of the IP address are allocated to host addresses and network prefixes
C.
It is used to hide subnets from external networks by masking the subnets with NAT
D.
It is used to differentiate a network as a classful network or a classless network
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【单选题】---This is the first time I _____ my first picture with my own hands. --- It’s time that you ____ a photo of me.
A.
took; took
B.
have taken; took
C.
took; will take
D.
will take; have taken
【单选题】If I were in movie, then it would be about time that I ______ my bead in my hands for a cry.
A.
bury
B.
am burying
C.
buried
D.
would bury
【单选题】－What did you think of the place? --I didn’t care for it at first, but after _____ time I got to like it．
A.
the；a
B.
/；a
C.
a；the
D.
/；the
【简答题】礼宾部通常有 , 和 等工作岗位。
【简答题】试题四（共15分） 阅读下列说明和C代码，回答问题1至问题 3，将解答写在答题纸的对应栏内。 【说明】 堆数据结构定义如下： 在一个堆中，若堆顶元素为最大元素，则称为大顶堆；若堆顶元素为最小元素，则称为小顶堆。堆常用完全二叉树表示，图4-1 是一个大顶堆的例子。 堆数据结构常用于优先队列中，以维护由一组元素构成的集合。对应于两类堆结构，优先队列也有最大优先队列和最小优先队列，其中最大优先队列采用大...
【单选题】—This is the first time I __________ my first picture with my own hands. —It's time that you __________ a picture for me.
A.
took; will take
B.
have taken; took
C.
took; took
D.
will take; have taken
【简答题】阅读理解 My name is Susan. I am a junior high school student. I like my school and my friends. I like my school because we have good teachers. They teach us many things. But then, I don't understand (明白) ...
【简答题】阅读理解。 Hello! My name is Mike. I am from (来自) the USA. Now I am in China with my parents. I like China. I like Chinese food, too. I have breakfast at home. I eat an egg, bread and porridge (粥) for brea...
【单选题】If I were in a movie, then it would be about time that I ______ my head in my hands for a cry.
A.
bury
B.
am burying
C.
buried
D.
would bury
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