[名词解释] 超亲优势（over-parent heterosis）
[名词解释] 超标优势（over-standard heterosis）
[名词解释] 中亲优势（超均优势）
[问答题] 试写出F1代超高亲优势和超标优势的计算公式。
[单选题]To improve parent-child relationships, teenagers are advised to be _______.A． obedientB． responsibleC． co-operativeD． independent
[单选题]F．requentlysingle-parentchildren________someofthefunctionsthattheabsentadultinthehousewouldhaveserved.A．)takeoffB)takeafterC)takeinD)takeon
[单选题]C．alling to a bully’s parent _____.［A］ has long existed but changed its content ［B］ is often done with careful thinking［C］ often leads to blaming and misunderstanding ［D］ is used to warn the child not to do it again
[单选题]Sometimes one parent of a child will kidnap his or her own child. In this case, ______ the Care Alertprogram.A． publics will get information fromB． television may not get information fromC． the parent will be punished byD． the child will be saved by