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【单选题】
一对夫妇表型正常,一个儿子为白化病患者,再次生出白化病患儿的可能性为____A.
1/3
B.
1/2
C.
1/4
D.
3/4
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反馈参考答案：
举一反三
【简答题】(1)ZigBee无线传感器网络中,主要有______、______、和______3种类型的设备。
【简答题】There (come, comes) the three noisy children from next door.
【简答题】一个屋顶的某一个斜面成等腰梯形,最上面一层铺了21块瓦片,往下每一层多铺一块瓦片,斜面上铺了20层瓦片,问共铺了多少块瓦片
【单选题】一个屋顶的某一个斜面成等腰梯形,最上面一层铺了21片瓦片,往下每一层多铺一片瓦片,斜面上铺了20层瓦片,问共铺了多少块瓦片?
A.
820
B.
410
C.
610
D.
1220
【单选题】There (comes, come) the three noisy children from next door.
A.
comes
B.
come
C.
comes/come
【简答题】There (comes, come) the three moisy children from next door.
【简答题】完型填空。通读下面短文，掌握其大意，然后从四个选项中选出一个最佳答案。 The train I was travelling 1 was already half 2 hour late. I had planned to 3 in London at 7:00 4 to catch the 7:50 train to Liverpool, but there was no hope 5 that...
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