晶闸管的三端的名称分别是阳极、阴极、（）。
参考答案：门极
— It is said that a new zoo will be built in our town.
— I'm ______ it. Zoos are terrible for animals. [ ]
A.through
B.besides
C.against
D.except
该生治疗骨质疏松，选大杼穴，因为该穴是：
A．脏会B．骨会C．腑会D．血会E．气会
