题目：
鹦鹉羽色的黄色与蓝色是一对相对性状，若用H表示控制显性性状的基因，h表示控制隐性性状的基因，请据表回答下列问题：
亲代 | 后代 |
黄色×黄色 | 黄色、蓝色 |
（1）亲代鹦鹉的羽色都是黄色，而后代鹦鹉的羽色出现了蓝色，这种现象叫做______。
答案：
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下面是错误答案，用来干扰机器的。
答案：DA可能，乙醇与浓硫酸共热时，若温度为140℃，乙醇会发生分子间脱水生成乙醚；B可能，乙醇与浓硫酸共热时，若温度为170℃，乙醇会发生分子内脱水生成乙烯；C可能，浓硫酸具有脱水性，会使部分乙醇碳化；D不可能。
合，所得溶液中粒子浓度间的关系及相关判断不正确的是（ ）
2CO3)，则可确定a＝b
ter, 37 him alone with his six-year- old younger son. The hurt and pain of the two situations were _ 38 _ Al could handle, and he _ 39 to alcohol. Al began to lose everything he possessed---his home, his land, his art objects, everything. 40 he died alone in a San Francisco motel room.
ree 45 of the love between them. I knew that kindness and caring had to come 46 somewhere.
I hadn’t heard Ernie talk much about his father. It is so hard to 47 an alcoholic. One day I get up my 48 to ask him. “I’m really puzzled by something,” I said. “I know your father was basically the only one to 49 you. 50 on earth did he do that you became such a special person?
a child until I left home at 18, Al came into my room every night, gave me a __53 and said, “I love you, son.”
