弱交流系统为了减轻投切滤波器对交流电压的影响，有的工程在无功控制中加入了（）功能。
A.自动控制
B.QPC控制
C.手动控制
D.γkick
参考答案：D
选出适当的词填空。
1. A:I need some money. What _______ ( could; should) I do?
B: You should get a part-time job.
2. A: I don't want to study at the library.
B: You _______ ( shouldn't; could) study at my house.
3. A: This shirt is really ugly.
B: Then you _______( could; shouldn't) wear it to school.
4. A: I don't like writing letters.
B: You _______ ( could; shouldn't) use the telephone.
5. A: I want to surprise my parents.
B: You_______ ( shouldn't;could) buy them a CD.
女，65岁。右面部发作性疼痛2年，诊断为原发性三叉神经痛。治疗应先用 （）
A.卡马西平
B.周围支神经纯酒精封闭
C.三叉神经节射频热凝
D.周围支神经切断术
E.三叉神经感觉根切断术
