对功能减退性内分泌疾病应首选下述哪种治疗（）
A.对症治疗
B.替代治疗
C.病因治疗
D.支持治疗
E.放疗及化疗
参考答案：B
—Shall I keep an eye on your house when you are on holiday?
—________.[ ]
A. It's up to you
B. Of course,you should
C. If you like
D. I would appreciate that
串联电路有什么特点？
