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Last summer, I began the biggest adventure of my life. I moved from a tiny city in England to one of the 1 cities in the world. As the plane 2 in Beijing, one of the first things I did was to 3 one of the city's hutongs. Walking around the 4 street,the warm air was filled with the 5 of delicious food as people played mahjong and 6 their old-fashioned bikes. This was the first moment I 7 ,“ Wow, I'm in China." Beijing couldn’t be more 8 from my home city, Preston, which 9 a population of just 114,000. It has one 10 street that’s around 500 metres from one end to the 11 and on Sunday, all the shops 12 at 4:00 p. m. There isn't a great deal of 13 when it comes to restaurants, either, and as a 14 of food, I couldn’t wait to see what Beijing has to 15 . I still don't have a favourite dish here yet —I’m still happily working my way through the city’s countless 16 to try to figure that out. I’m slowly getting used 17 the fast-paced lifestyle and different 18 of life. In the future, I hope to buy a motorbike and 19 from one end to the other of this beautiful city, taking photos and 20 new people along the way.
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【单选题】经调查统计,某地区人群中蓝眼(aa)1600人,纯合褐眼(AA)1400人,杂合褐眼(Aa)7000人,那么蓝眼基因和褐眼基因的频率分别是 [     ]
A.
43%和57%
B.
51%和49%
C.
28%和72%
D.
32%和68%
【单选题】人的褐眼为显性性状,蓝眼为隐性性状.若父母都为蓝眼,一般情况下子女的性状(  )
A.
全为蓝眼
B.
全为褐眼
C.
既有蓝眼、又有褐眼
D.
不能确定
【单选题】正常人的褐眼(A)对蓝眼(a)为显性,一个蓝眼男子和一个其母是蓝眼的褐眼女子结婚。从理论上分析,他们生蓝眼孩子的概率是
A.
50%
B.
25%
C.
75%
D.
125%
E.
100%
【多选题】JT1-CZ2000机车信号车载系统远程监测系统车载终端获取的机车信号设备输出信息包括()
A.
点灯输出
B.
速度等级
C.
绝缘节
D.
电源状况
【多选题】JT1-CZ2000机车信号车载系统记录器的状态信息主要来自()
A.
机车信号记录器自身采集信息
B.
机车车载的机务TAX箱信息
C.
主机译码信息
D.
波形信息
【简答题】JT1-CZ2000机车信号主机板块输出为直流()。
【单选题】JT1-CZ2000机车信号主机板块输出为直流()
A.
2.5V
B.
5V
C.
10V
D.
24V
【单选题】“独学而无友,则孤陋而寡闻”指的是大学生要树立___的理念。
A.
自主学习
B.
全面学习
C.
合作学习
D.
终身学习
【单选题】人类对PTC的尝味能力是显性遗传,味盲是隐性遗传;褐眼对蓝眼是显性。一个褐眼味盲(其母亲为蓝眼)和一个蓝眼尝味者(其母亲为味盲)结婚,子女中褐眼味盲的比例为( )。
A.
1
B.
1/2
C.
1/4
D.
3/4
E.
0
【多选题】JT1-CZ2000机车信号车载系统记录器的状态信息包括()
A.
主机译码信息
B.
波形信息
C.
状态变信息
D.
实时变信息
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