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【简答题】
两个不同基因型的噬菌体杂交后所测定的重组频率如下： ab+×a+b 3．0％ ac+×a+c 2．0％ bc+×b+c 1．5％ (1)a、b、c 3个突变在连锁图上的次序如为什么它们之间的距离不是累加的? (2)假定三因子杂交：ab+c×a+b c+，预期哪两种类型的重组子频率最低? (3)计算从b所假定的三因子杂交中出现的各种重组类型的频率。
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【单选题】下面3个判断：①一个三角形的3个内角中最多有1个直角；②一个三角形的3个内角中至少有两个锐角；③一个三角形的3个内角中至少有1个钝角，其中正确的有（ ）
A.
0个
B.
1个
C.
2个
D.
3个
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【简答题】A computer can help diagnose an illness. It can yze test results. It can watch 1 a very sick patient. It can 2 a proper diet for a patient. 3 about the patient's present condition is 4 into the co...
【判断题】If an organisation is not delivering the results its management wants, management can use the culture web to help diagnose whether the organisation's culture is contributing to the underperformance.
A.
正确
B.
错误
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A.
正确
B.
错误
【简答题】一个三角形中至少有______个锐角，至多有______个直角．
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