A．1.6×10-10C
B．6.4×10-6C
C．3.2×10-20C
D．4.8×10-19C
答案：C
固冲汤的功用
A．川芎B．当归C．黄芪D．附子E．白芍
—Do you often help your cousin with his English?
—No. He learns English _______.
A．by himself
B．for himself
C．himself
D．on himself
