计算机内部存储一个汉字需要（）个字节。
A.1
B.2
C.4
D.8
参考答案：B
"Genius" is a complicated concept, _ _ many different factors. [ ]
A. involved
B. involving
C. to involve
D. being involved
既可用于给液体加热，又可用于给固体加热的玻璃仪器是（ ）
A．试管
B．烧瓶
C．烧杯
D．蒸发皿
