在氧化铜、氧化镁和五氧化二磷中都含有 ______元素，它们都属于 ______

He ____________ her some books tomorrow morning. [ ]

A. gives

B. will give

C. giving

_____ our eating ties in with our stress level is being studied and soon it will be clear. [      ]

A. That         

B. How          

C. Where         

D. What

圆的周长=______圆的面积=______．

烧伤后1～2周内，下列哪种药物可诱发心搏骤停（）

A.筒箭毒碱

B.琥珀胆碱

C.阿曲库铵

D.罗库溴铵

E.维库溴铵

字符“A”的ASCII值为41H，因此字符“E”的ASCII值为______，前面加上偶校验位后的代码为C5H。