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听力原文:W: Good morning, this is Ann broadcasting from university radio. In the local news this morning, the mountain-lake cycle tour is about to begin, and in the studio we have with us Robin, president of the Martha Bicycle Club, the tour's sponsor. Robin, can you tell us what the tour's all about? M: Well, Ann, the mountain-lake cycle tour today is a bicycle tour from Ottawa to Kingston and back. It is not a race, but more like an endurance test for recreational cyclist. People do it for fitness and fun and try to better their time every year. W: How long will it take to cycle one-way, Robin? M: About seven to nine hours for the average cyclists. Racers can do it in four hours. But I said, the tour is not intended to be a race. W: How many people will be taking part this year? M: This is our biggest year ever. We have twelve hundred cyclists registered. W:I doubt they'll block the road when the cyclists start out? M: Don't worry, we've introduced the staggered starts to avoid these problems.Our first group will leave Ottawa at seven o'clock, and other groups will follow every twenty minutes. W: Thank you, Robin. Now down to the starting line of the university. Where does this interview take place?
A.
In the radio studio.
B.
In the bicycle shop.
C.
On the road.
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【单选题】整流电路输入和输出电压波形如下图右侧所示,则以输出该波形的电路可能是()
A.
图A
B.
图B
C.
图C
D.
图D
【单选题】整流电路输入和输出电压波形如下图右侧所示,则以输出该波形的电路可能是( )
A.
图A
B.
图B
C.
图C
D.
图D
【多选题】放大电路如下图(左)所示,输入电压 U i 与输出电压 U o 的波形如下图(右)所示,为使输出电压波形 不失真则应()。
A.
增加 R C
B.
增加 R B
C.
减小 R B
D.
减小 R C
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A.
重病者不准乘飞机旅行
B.
需购买两张全程票并有专人陪同
C.
购买相应保险后方可乘机旅行
D.
持有医院出具的适于乘机的证明,经航空公司同意就可购票乘机
【单选题】整流电路输入和输出电压波形如下图右侧所示,则以输出该波形的电路可能是( )
A.
图A
B.
图B
C.
图C
D.
图D
【单选题】整流电路输入和输出电压波形如下图右侧所示,则以输出该波形的电路可能是( )
A.
图A
B.
图B
C.
图C
D.
图D
【多选题】下图电路的输入输出电压波形如下右图所示,图中输出波形出现了底部削波失真,要克服该失真可()
A.
可适当增大Rb1的电阻值
B.
可适当减小Rb1的电阻值
C.
可适当增大Rb2的电阻值
D.
可适当减小Rb2的电阻值
【判断题】“凡事豫则立,不豫则废。”强调的是任何事情,事前有准备就可以成功,没有准备就要失败。()
A.
正确
B.
错误
【单选题】旅游团中一老年游客病重,要求乘飞机去上海市治疗,对此导游人员要告知航空公司的有关规定是
A.
重病者不准乘飞机旅行
B.
需购买两张全程票并有专人陪同
C.
购买相应保险后方可乘机旅行
D.
持有医院出具的适于乘机的证明经航空公司同意方可购票乘机
【判断题】“凡事豫则立,不豫则废。”强调的是任何事情,事前有准备就可以成功,没有准备就要失败。
A.
正确
B.
错误
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