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【单选题】
Inmarsat F系统中采用全球波束是为了_____。
A.
为南北两极地区提供服务
B.
为进一步提高F系统的通信容量
C.
确保GMDSS的实施
D.
为改善移动站的性能
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】直接调频与间接调频相比,以下说法正确的是 ( )
A.
．直接调频频偏较大，中心频率稳定
B.
．直接调频频偏较大，中心频率不稳定
C.
．间接调频频偏较大，中心频率不稳定
D.
．间接调频频偏较大，中心频率稳定
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【单选题】What does the man's Morn do?
A.
The man's Morn works in a hospital.
B.
The man's Mom works in a restaurant.
C.
The man's Mom works at home.
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【单选题】Man: What's the noise upstairs? Woman: It seems they're wrestling. Man:______.
A.
I can't stand it any more.
B.
I don't like it.
C.
What a shame.
D.
It's a storm in a tea cup.
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【判断题】A: What's the date today? B: It's April 1st.()
A.
正确
B.
错误
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【简答题】阅读理解。 St. Martin's Day is a holiday in Holland. St. Martin was a man who did kind things for many people in need. One cold winter day he was walking home. He wore a coat to keep warm and had a small p...
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【单选题】设TTL异或门的输入端为A、B，若将其作反相器使用，则A、B端应 连接。
A.
A或B端有1个接入高电平
B.
A、B端并联在一起使用
C.
不能实现
D.
A或B端有1个接入低电平
查看完整题目与答案
【简答题】阅读理解。 St. Martin's Day is a holiday in Holland. St. Martin was a man who did kind things for many people in need. One cold winter day he was walking home. He wore a coat to keep warm and had a small p...
查看完整题目与答案
【单选题】What does the man know about St.Mary’s church?
A.
they have a beautiful organ
B.
there will be a recital in the church
C.
the church is a beautiful building
查看完整题目与答案
【单选题】设TTL异或门的输入端为A、B,若将其作反相器使用,则A、B端应 连接。
A.
A、B端并联在一起使用
B.
A或B端有1个接入低电平
C.
A或B端有1个接入高电平
D.
不能实现
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【单选题】— — It’s May 1st.
A.
What day is it?
B.
What’s the date?
C.
What’s the time?
D.
What time is it?
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相关题目：
【单选题】直接调频与间接调频相比,以下说法正确的是 ( )
A.
．直接调频频偏较大，中心频率稳定
B.
．直接调频频偏较大，中心频率不稳定
C.
．间接调频频偏较大，中心频率不稳定
D.
．间接调频频偏较大，中心频率稳定
查看完整题目与答案
【单选题】What does the man's Morn do?
A.
The man's Morn works in a hospital.
B.
The man's Mom works in a restaurant.
C.
The man's Mom works at home.
查看完整题目与答案
【单选题】Man: What's the noise upstairs? Woman: It seems they're wrestling. Man:______.
A.
I can't stand it any more.
B.
I don't like it.
C.
What a shame.
D.
It's a storm in a tea cup.
查看完整题目与答案
【判断题】A: What's the date today? B: It's April 1st.()
A.
正确
B.
错误
查看完整题目与答案
【简答题】阅读理解。 St. Martin's Day is a holiday in Holland. St. Martin was a man who did kind things for many people in need. One cold winter day he was walking home. He wore a coat to keep warm and had a small p...
查看完整题目与答案
【单选题】设TTL异或门的输入端为A、B，若将其作反相器使用，则A、B端应 连接。
A.
A或B端有1个接入高电平
B.
A、B端并联在一起使用
C.
不能实现
D.
A或B端有1个接入低电平
查看完整题目与答案
【简答题】阅读理解。 St. Martin's Day is a holiday in Holland. St. Martin was a man who did kind things for many people in need. One cold winter day he was walking home. He wore a coat to keep warm and had a small p...
查看完整题目与答案
【单选题】What does the man know about St.Mary’s church?
A.
they have a beautiful organ
B.
there will be a recital in the church
C.
the church is a beautiful building
查看完整题目与答案
【单选题】设TTL异或门的输入端为A、B,若将其作反相器使用,则A、B端应 连接。
A.
A、B端并联在一起使用
B.
A或B端有1个接入低电平
C.
A或B端有1个接入高电平
D.
不能实现
查看完整题目与答案
【单选题】— — It’s May 1st.
A.
What day is it?
B.
What’s the date?
C.
What’s the time?
D.
What time is it?
查看完整题目与答案