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【单选题】
基因频率和基因型频率保持不变,是在( )中,交配一代后情况下能够实 现。A.
自花粉群体
B.
回交后代群体
C.
随机交配群体
D.
测交后代群体
E.
自花粉群体
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【单选题】What is NOT significant of the increase of wind power?
A.
Wind power is the fastest growing energy source.
B.
Wind power has become an ever-expanding industry.
C.
The wind power is creating thousands of jobs in Germany.
D.
The electricity generated by wind power in 1999 is enough for 5 million suburban homes.
【单选题】请阅读下面的程序: i=3 j=5 while True: if i<5: i+=i print(i) break elif j<1: j-=j print(j)
A.
8
B.
2
C.
6
D.
0
【单选题】以下循环终止后将显示什么? number = 55 isPrime = True i = 2 while i if number % i == 0: isPrime = False i += 1 print("i is", i, "isPrime is", isPrime)
A.
i is 5 isPrime is True
B.
i is 5 isPrime is False
C.
i is 6 isPrime is True
D.
i is 6 isPrime is False
【单选题】What will be the output of the following Python code? i = 1 while True: ----if i%2 == 0: --------break ----print(i) ----i += 2
A.
1
B.
1 2
C.
1 2 3 4 5 6 …
D.
1 3 5 7 9 11 …
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