【单选题】There are many shops on ________ side of the street.
【简答题】They put up many shops and restaurants to satisfy the needs of tourists.
【单选题】唇裂的遗传率为76%,在我国群体中的发病率为0.17%,一对表型正常的夫妇生了一个唇裂患儿,试问他们再次生育时,子女唇裂的可能性约为
【判断题】老人进餐前应嘱先喝些汤或水,以润滑口腔。
【单选题】交流市电电源标称电压220v,受电端子上电压变动允许范围为:
【简答题】人类的白化病是一种隐性遗传病,其致病基因在常染色体上,图七为一对正常夫妇生出白化病孩子的遗传图解,请据图回答有关问题. (1)人类的白化肤色和正常肤色是肤色的不同表现类型,在遗传学上称为______. (2)分析图示可得出①和②的基因组成分别是______. (3)该对夫妇生正常孩子的几率______. (4)遗传病目前一般不能得到根治,应以预防为主.近亲结婚所生子女的遗传病患病率远高于非近亲结婚...
【单选题】There are many shops on sides of the street.
【简答题】A.Increase the sample number. B.Extend the time of the study. C.Observe the sample group of vegetarians. D.Both A and B.