体内最重要的内分泌腺体是
A．胰岛
B．甲状腺
C．腺垂体
D．肾上腺
E．性腺
参考答案：C
I knew nothing about the accident _______ my friend told me yesterday. [ ]
A. because
B. since
C. after
D. until
长期偿债能力的强弱是反映客户财务状况稳定与安全程度的重要标志。 ( )
