A．轴心压杆
B．压弯构件
C．轴心拉杆
D．拉弯构件

A．biasing the transistors deeply into cutoff
B．biasing the transistors slightly above cutoff
C．using complementary-symmetry transistors
D．increasing the load resistance

A.开发区、城市新区、风景名胜区管理机构
B.村（居）委会