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(1)每对相对性状的遗传符合 定律。
(2)亲本的基因型:黄圆是_______,绿圆是
(3)杂交后代中非亲本类型性状组合占 ,其中双隐性个体占 。
(4)杂交后代中能稳定遗传的数量占总数的_________。 查看习题详情和答案>>
选出正确的单词,填空。
Hello! I'm Jenny. In the ________, I get up and I have ________ for my ________. In the afternoon, I often drink ________. Then I do my ________. In the ________, I eat supper. I don't like peas
(豌豆)or tomatoes(土豆), so I don't like ________ at all. But I like apples, peaches and pears. So I like ________. My ________fruit is apples. Word List:noodles, homework, tea, morning, vegetables, evening, breakfast, fruit, favourite
查看习题详情和答案>>A farmer saw an old man planting something on the other side of the river. The farmer called out to him:
“What are you planting, old man?”The old man did not speak for a moment, then said,“Swim over and I'll tell you.”The farmer did. not like the idea of swimming across the river. But he did want to know what the old man was doing. He swam over, The old man said in a low voice.“I'm planting peas(豌豆)in my field.”“Then why was it necessary(必要的)for me to swim across the river. You could have shouted. I would have heard quite clearly on that side of the river”.“Oh, no, I couldn't do that. The birds would have heard me and eaten up my peas”.根据短文内容,正确写“
T”,错误写“F”.(1) A farmer saw his grandpa planting something on the other side of the river.
( )
(2) The old man answered the farmer's question at once.
( )
(3) The farmer really wanted to know what the old man Was planting.
( )
(4) When the old man told the farmer he was planting peas, the farmer was a little angry.
( )
(5) The old man is really afraid that birds would eat up his peas when they heard his words.
( )
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