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【单选题】
在如图所示的施密特触发器电路中,当Vcc=12V时,其回差电压ΔVT是多少伏?( )
A.
8V
B.
6V
C.
4V
D.
2V
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举一反三
【单选题】下列哪种选项是情绪对时间估计长短的影响规律
A.
正在经历的事件，愉快情绪则过得慢
B.
盼望的事件，愉快情绪的事件来得慢
C.
已经过去的事件，情绪不愉快则显得长
D.
正经历的事件，情绪不愉快则过得快
查看完整题目与答案
【判断题】在中国,各种照明灯具、家用电器的额定电压一般都是380V。
A.
正确
B.
错误
查看完整题目与答案
【单选题】删除Goods表中,g_ID='040002'的商品信息语句是_______ from Goods where g_ID='040002'
A.
drop
B.
delete
C.
select
D.
cut
查看完整题目与答案
【单选题】Which of the following is not a valid subnet ID for network 10.0.0.0, using mask /25, assuming that this mask is used throughout the network?______
A.
10.0.0.0
B.
10.255.255.0
C.
10.255.127.128
D.
10.1.1.192
查看完整题目与答案
【单选题】There are so many kinds of MP3 in the shop. We can’t decide ________. [     ]
A.
what to buy
B.
to buy what
C.
which to buy
D.
to buy which
查看完整题目与答案
【单选题】The party who must decide whether to exercise the option is termed the option ___.
A.
customer
B.
buyer
C.
dealer
D.
seller
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【单选题】The 201.145.32.0 network is subnetted using a /26 mask. How many networks and IP hosts per network exists using this subnet mask?（）
A.
4 networks with 64 hosts
B.
64 networks and 4 hosts
C.
2 networks and 62 hosts
D.
62 networks and 2 hosts
E.
6 network and 30 hosts
查看完整题目与答案
【单选题】下列哪种选项是情绪对时间估计长短的影响规律
A.
正在经历的事件，愉快情绪则过得慢
B.
已经过去的事件，情绪不愉快则显得长
C.
盼望的事件，愉快情绪的事件来得慢
D.
正经历的事件，情绪不愉快则过得快
查看完整题目与答案
【多选题】Using a subnet mask of 255.255.255.224, which of the IP addresses below can you assign to the hosts on this subnet?（）
A.
16.23.118.63
B.
87.45.16.159
C.
92.11.178.93
D.
134.178.18.56
E.
192.168.16.87
F.
217.168.166.192
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【单选题】When a person practicing a particular yoga exercise has stretched his body to the point where it begins to hurt, he should______
A.
begin breathing through the nostrils
B.
slow down somewhat, but continue straining
C.
stop the particular exercise at once
D.
close his mouth immediately
查看完整题目与答案
相关题目：
【单选题】下列哪种选项是情绪对时间估计长短的影响规律
A.
正在经历的事件，愉快情绪则过得慢
B.
盼望的事件，愉快情绪的事件来得慢
C.
已经过去的事件，情绪不愉快则显得长
D.
正经历的事件，情绪不愉快则过得快
查看完整题目与答案
【判断题】在中国,各种照明灯具、家用电器的额定电压一般都是380V。
A.
正确
B.
错误
查看完整题目与答案
【单选题】删除Goods表中,g_ID='040002'的商品信息语句是_______ from Goods where g_ID='040002'
A.
drop
B.
delete
C.
select
D.
cut
查看完整题目与答案
【单选题】Which of the following is not a valid subnet ID for network 10.0.0.0, using mask /25, assuming that this mask is used throughout the network?______
A.
10.0.0.0
B.
10.255.255.0
C.
10.255.127.128
D.
10.1.1.192
查看完整题目与答案
【单选题】There are so many kinds of MP3 in the shop. We can’t decide ________. [     ]
A.
what to buy
B.
to buy what
C.
which to buy
D.
to buy which
查看完整题目与答案
【单选题】The party who must decide whether to exercise the option is termed the option ___.
A.
customer
B.
buyer
C.
dealer
D.
seller
查看完整题目与答案
【单选题】The 201.145.32.0 network is subnetted using a /26 mask. How many networks and IP hosts per network exists using this subnet mask?（）
A.
4 networks with 64 hosts
B.
64 networks and 4 hosts
C.
2 networks and 62 hosts
D.
62 networks and 2 hosts
E.
6 network and 30 hosts
查看完整题目与答案
【单选题】下列哪种选项是情绪对时间估计长短的影响规律
A.
正在经历的事件，愉快情绪则过得慢
B.
已经过去的事件，情绪不愉快则显得长
C.
盼望的事件，愉快情绪的事件来得慢
D.
正经历的事件，情绪不愉快则过得快
查看完整题目与答案
【多选题】Using a subnet mask of 255.255.255.224, which of the IP addresses below can you assign to the hosts on this subnet?（）
A.
16.23.118.63
B.
87.45.16.159
C.
92.11.178.93
D.
134.178.18.56
E.
192.168.16.87
F.
217.168.166.192
查看完整题目与答案
【单选题】When a person practicing a particular yoga exercise has stretched his body to the point where it begins to hurt, he should______
A.
begin breathing through the nostrils
B.
slow down somewhat, but continue straining
C.
stop the particular exercise at once
D.
close his mouth immediately
查看完整题目与答案