胎儿的性别是由（）决定的。 ["母亲的基因","父亲的基因","父母的混合基因","胎儿的生存环境"]
《创造力本质》一书的作者是（）。 ["斯科森特米哈依","格鲁伯","瓦伦斯","斯坦伯"]
分步法适用于（）。 ["大量生产","大批生产","成批生产","多步骤生产","单步骤生产"]
Which two statements about the open and shared key wireless-authentication methods are true？ （） [" Shared key authentication is considered more secure than open authentication."," Shared key authentication is considered less secure than open authentication."," If the WEP keys do not match using the open authentication method， the client will not authenticate， associate， and transfer data."," If the WEP keys do not match using the open authentication method， the client will still be able to authenticate and associate， but will not transfer data."," If the WEP keys do not match using the open authentication method， the client will still be able to authenticate， associate， and transfer data."]
综合重合闸有几种运行方式？各是怎样工作的？
对产品的设计、试制阶段进行的成本控制属（）。
