催化燃烧式可燃气体探测器此类探测器是在白金电阻的表面制备耐高温的催化剂层，在一定的温度下，可然性气体在其表面（）燃烧使白金电阻温度升高，电阻变化，变化值是可燃性气体浓度的函数。 ["催化","燃烧","催化燃烧","凝结"]
Which two demonstrate encapsulation of data？ （） [" Member data have no access modifiers."," Member data can be modified directly."," The access modifier for methods is protected."," The access modifier to member data is private."," Methods provide for access and modification of data."]
什么是简单土坡？
按计划对象范围划分，营销计划.生产计划属于（）。 ["总体计划","综合计划","局部计划","项目计划"]
摩尔根在遗传学发展中的重要贡献在于（） ["分离定律的发现","自由组合定律的发现","第一次把一个特定基因与特定染色体上的特定位置联系起来","基因连锁的发现"]
魏晋南北朝儒经转型期的标志是什么？
