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【判断题】
现将一只 100W、220V的灯泡和另一只60W、220V的灯泡串联接在220V电压下,60W、220V的灯泡消耗的功率大。A.
正确
B.
错误
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【单选题】当两套系统使用Internet连接时，通常与L2TP一同使用IPSec以保证数据安全。以下回答中正确表述了这些协议所工作的OSI网络层次的是哪一个（）
A.
IPSec工作在网络层，L2TP工作在传输层
B.
IPSec工作在传输层，L2TP工作在物理层
C.
IPSec工作在网络层，L2TP工作在数据链路层
D.
IPSes和L2TP都工作在网络层
【单选题】He doesn’t have anything to say. He doesn’t know ____ the student.
A.
about
B.
for
C.
with
D.
from
【单选题】What does the man mean?
A.
He doesn’t have a ticket．
B.
He doesn’t like volleyball．
C.
He is not invited to the game．
【单选题】以下哪一项工作在网络层?它能将一条线路上进入的分组接收后转发到另一条线路上,这些线路可以属于不同的网络,并且使用不同的协议
A.
网桥
B.
网间连接器
C.
中继器
D.
路由器
【单选题】He doesn’t have anything to say. He doesn’t know ____ the student.
A.
of
B.
for
C.
with
D.
from
【简答题】Nick is a knight(骑士). But he doesn’t like to ride and he doesn’t like to fight. Nick likes to read and write, and he likes to knit(编织). One night, there was a knock at the door. “I need you to fight a...
【简答题】A. He doesn’t like it. B. He has a toothache. C. He wants to save it. D. He has trouble opening his mouth. 2. A. He doesn’t like the color. B. He doesn’t like the style. C. He doesn’t have enough mone...
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【单选题】He doesn’t have anything to say. He doesn’t know ____ the student.
A.
of
B.
for
C.
with
D.
from