—Only one of these books is worth _______.

—_______ is no wonder that you look so upset.

A．to read; That

B．of reading; This

C．being read; There

D．reading; It

炒黄

A．生片、糊片不得超过2%，药屑、杂质不得超过1%
B．生片、糊片不得超过2%，药屑、杂质不得超过2%
C．生片和完全炭化片不得超过5%，药屑、杂质不得超过3%
D．生片、炭化片不得超过3%，药屑、杂质不得超过2%
E．其他

对于饮片炮制品的质量要求