截止2013年底,移动操作系统中发现漏洞数最多的是哪个系统?()
Android
B. iOS
C. Windows Phone
D. BlackBerry
教师道德最主要、最基本的功能是通过制订规范以他律来约束教师的行为。
A. 正确
B. 错误
The cooling water jacket is common to all the cylinders but there are often () to ensure that each cylinder receives the right amount and flow of water.
A. dividing walls
B. divided walls
C. dividing liners
D. divided jacket