为限制内部过电压装设的（），在变压器等被保护设备运行中不得断开。
A.避雷器
B.电压互感器
C.电流互感器
D.电抗器
参考答案：A
腹部叩诊能确定正常大小的有（）
A.胆囊
B.脾
C.肾
D.胃
E.肝
The China Travel Service (or the CTS) (中国旅行社，简称“中旅社”), the first travel service of New China, is now one of the key elements in China’s travel industry. It boasts the largest travel service with the most complete and fully-functioning network in the country. Currently the CTS group has over 200 subordinate travel services, 117 hotels, 46 duty free shopping centers and 62 tourist service companies all over China.
