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【单选题】
C类IP地址的网络地址为前三个八位数组,第一个字节以( )开始A.
101
B.
100
C.
110
D.
10
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【简答题】如果a≠0且a、b互为相反数，则在下列各组数中不是互为相反数的一组是（ ） A． 3 a 与 3 b B． a 2 与 b 2 C．3a与3b D．a+1与b-1
【单选题】Some of our industrial products have been said advanced level.
A.
to reach
B.
to be reaching
C.
to have reached
D.
to have been reaching
【单选题】We might say our products have ______ warm reception everywhere and hope they will be able to your requirements.
A.
met, meet with
B.
met with, meet
C.
met, met with
D.
met with, met
【单选题】—Perhaps you have heard our products. Would you like to know something more? —_________________
A.
Sure. Go ahead.
B.
I don’t need anything.
C.
I‘ve heard lot about you.
【单选题】如果a＞b，且c＜0，那么在下面不等式中： （1）a+c＞b+c；（2）ac＞bc；（3） - a c ＞- b c ；（4）ac 2 ＞＜bc 2 ．成立的个数是（ ）
A.
1
B.
2
C.
3
D.
4
【单选题】The market competition is fierce, but our products have great advantage ______ quality and price.
A.
in place of
B.
in view of
C.
in case of
D.
in terms of
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