蜜炙后可矫正劣味、避免呕吐的药物是（） A.款冬花 B.马兜铃 C.麻黄 D.瓜蒌皮

已知三角形的3条中位线分别为3cm、4cm、6cm，则这个三角形的周长是______．

机械设备的哪些部位应设防护装置？（）

A．飞轮

B．手柄

C．操作面板

管制权的主体是乡、镇级以上人民政府的公安机关。( )

多党制

The use of computer graphics (1) many diverse fields. Applications (2) from the production of charts and graphs, to the generation of realistic images for television and motion pictures to the (3) design of mechanical parts.To encompass all these uses, we can adopt a simple definition:Computer graphics is concerned with all (4) of using a computer to generate images.We can classify applications of computer graphics into four main areas:Display of information, Design, (5) ,User interfaces.

A．alternant

B．interactive

C．alternate

D．interactant