常用卤水的比重有1.22g/cm3、1.26g/cm3（）三种类型。A.1.30g/

用整数10创建一个Integer类的对象，下列各语句中能完成此功能的是( )。

A．Integer i=new Integer(10)；

B．Integer i=10；

C．int i=10；

D．Integer i=Integer(10)；

Who is _____ the door? Let me go and see.[ ]

A. in

B. at

C. for

D. of

医师应依法履行医疗质量安全事件、（）、药品不良反应、食源性疾病和涉嫌伤害事件或非正常死亡等法定报告职责。

A.传染病疫情

B.食品安全

C.药品不良反应

D.医疗器械不良反应

Although the bulk of industry resources and energies have focused on developing the fastest (11) or slickest (12) , more and more mindshare is turning to the evolution of the computer interface. Advancements in the areas of input devices, (13) processing and virtual reality could lead to fundamental changes in the way human and computer interact. The technological battlefield of the future will be adding layers between the user and the raw machine to make the (14) as invisible as possible. (15) represents the next evolutionary step for the interface.

（13）是（）

A.microprocessor

B.operatingsystems

C.voice

D.interface

高度为h(h＞O)的二叉树最少有 【3】 个结点。