【简答题】交换值的幅度经常变动在 __________ 之间;交换值越接近 __________ ,说明两个连锁的非等位基因之间的连锁强度越大;当交换值越接近 __________ ,连锁强度越小。
【判断题】任意一个真分数的倒数一定大于l。 [ ]
【简答题】真分数的倒数一定大于1,假分数的倒数一定小于1.______.
【单选题】---Did the little boy manage _____ the suitcase upstairs? ---No, he didn’t. He isn’t strong enough even ______ it.
【简答题】假分数的倒数一定是小于1,真分数的倒数一定大于1.______.
【单选题】-- Why didn't Mike attend the evening party? -- He is a quiet boy; He loves reading at home ______ to parties.