In the rice-growing world, ______ Chinese scientist, Yuan Longping, is ______ leading figure.

A．a; the

B．the; a

C．a; a

D．the; the

一个汉字的国标码需用2字节存储，其每个字节的最高二进制位的值分别为______。

A．0 0
B．1 0
C．0 1
D．1 1