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【单选题】
分析品类的周期性特点，把握产品开发先机的工具是A.
Alexa
B.
KeywordSpy
C.
Google Trends
D.
GA
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反馈参考答案：
举一反三
【单选题】He handed in his paper and left a few questions .
A.
anewered
B.
answering
C.
unanswered
D.
unanswering
【简答题】When will Charlie have to hand in his paper?
【单选题】How long did the author turn in his paper?
A.
3 days later
B.
5 days later
C.
A week later
D.
A month later
【单选题】煤粉中挥发分降低,着火温度会( ); 水分降低,着火热( ),着火( ); 灰分增加,着火( ); 煤粉细,着火( )。
A.
降低，增大，加快，推迟，早
B.
降低，减小，推迟，推迟，早
C.
升高，降低，加快，推迟，加快
【单选题】下列4项中,可以为网络主机设置的合法IP地址是()
A.
190.220.5
B.
206.53.4.0
C.
206.53.312.78
D.
207.43.62.220
【单选题】Which of the following is true according to the text?
A.
In his paper, Dr. Arien proves that HIV is weakening in Europe and Africa.
B.
Two kinds of blood samples are placed in two different cell cultures to be observed.
C.
Dr. Arien has made the cause of attenuation of virus clear.
D.
There are 3/4 of the viruses in Dr. Arien's study proving to be less harmful.
【简答题】网络配置案例 (15分) 某一网络地址块 192.168.3 0 .0中有5台主机A 、 B 、 C 、 D和E,它们的IP地址及子网掩码如下表所示,回答下列五个问题。 主机 IP地址及子网掩码表 主机 IP地址 子网掩码 A 192.168.3 0 .29 255.255.255.2 24 B 192.168.3 0 .148 255.255.255.2 24 C 192.168.3 0 .15...
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