【简答题】如图为某家族的遗传病系图谱(基因用A、a表示,且位于常染色体上),请据图分析回答: (1)该病是受______性基因控制的遗传病. (2)3号的基因型是______;9号的基因型是______. (3)3号和4号婚配,生育一个患病男孩的几率是______ (4)为降低此遗传病的发生,可采取哪些预防措施?(两种以上)______;______.
【简答题】完形填空。 Rosa likes up (编造) stories. At first she thought it was 1 . But now she didn't think so. Rosa's parents were divorced (离婚). Nine months out of the year, Rosa lived with her mother in an a...
【简答题】Welcome back to “True Stories.” And now before we say good night...This next story is a really 1 one. Mary Gage, a 2 and art history teacher, had a very 3 night last night. Take a look at these photos...
【简答题】A woman will see her friend. Her friend’s home is very far. 1 she takes some hamburgers with her. 2 her way, she says to herself, “My friend will give 3 a very good lunch. I don’t need these hamburger...
【单选题】实心圆轴的抗扭截面系数为 W p= ( )