题目

If you want to have true friends, you should be a true friend yourself. Wonder______you can do? Here are some tips._______and cry togetherLaughing with a friend is the best, _______sometimes crying brings you closer(更亲密的) together. Don't be _______to be yourself when you stay you’re your friends. Share your________ feelings with your friends. Then friends will know each other________better.Be a nice gift giver Gift-giving isn't just for birthdays or holidays--it can be a fun way of making your friends______special! But you don't need to buy_______gifts. Making things by yourself_____人类的皮肤含有黑色素，皮肤中黑色素的多少由两对独立遗传的基因（A和a、B和b）所控制，每个显性基因对黑色素的增加效应相同且可以累加。一个基因型为AaBb的男性与一个基因型为AaBB的女性结婚，下列关于其子女皮肤颜色深浅的描述中错误的是（ ）A．可产生四种表现型 B．肤色最浅的孩子基因型是aaBbC．与亲代AaBB肤色深浅一样的有l/4 D．与亲代AaBb 肤色深浅一样的有3/8