某植物的花有紫色、红色和白色三种性状，且由三对等位基因控制．现有五个纯合品系的紫花（AABBdd）、红花（aaBBdd）、白花甲（aabbdd）、白花乙（aabbDD）和白花丙（aaBBDD）植株若干，进行四组杂交实验后，结果如下表所示．回答下列问题．

（1）这种植物花色的遗传符合哪些遗传定律？____ ．已知四组杂交组合中白花的基因型为aabbdd、A　_　bbdd、　____　D_，则紫花的基因型是____ ．在杂交3中，F₂白花植株的基因型共有____ 种．

（2）某红花的自交后代中出现一个白花植株．其产生的原因可能是杂合子的后代隐性基因纯合的结果，或者是纯合子发生基因突变的结果（突变只涉及一个基因）．现利用五个纯合品系中的某白花植株为亲本，通过杂交实验来确定该白花植株形成的具体原因．请写出实验思路，并分析实验结果及结论．

____ 

____

A:You've tried on two skirts.

B:Sorry for taking up too much time of yours. But ______ of them looks nice on me.

作为中学生，我们要关注国家经济发展，主动了解我国的基本经济制度、分配制度。下列理解正确的是（     ）

①我国基本经济制度的确立是由我国社会主义性质和初级阶段国情决定的

②我国基本经济制度的确立是由我国社会主义性质决定的

③我国的基本经济制度决定了与之相适应的分配制度

④我国的分配制度决定了与之相适应的基本经济制度

    Little Tom likes cartoons very much .When the cartoons begin on TV, he does nothing until they' re over. Sometimes he'd rather wait for a long time and go to bed late. In the morning his mother has to wake him up, or he will be late for school.
    Yesterday Tom heard there would be an interesting cartoon today. This morning, as soon as he got up, he turned the television, but didn't receive the programme. He had to have breakfast and then went to school. After school he ran home while his mother was cooking supper in the kitchen (厨房). He hurried to the sitting room and turned on the television again, but he couldn’t find the cartoon. He rushed into the kitchen and asked his mother to help.
    “It's only five now,”said the woman. “Your programme will be after supper.”
    “Well, let's have supper right now!”