防爆电动机接线时（）应与接线盒内接地螺栓相连接。
A.零线
B.火线
C.电源线
D.信号线
参考答案：A
Tom often _____ TV on weekends. Today is Sunday. He _____ TV now.[ ]
A. watch, is watching
B. watches, is watching
C. watches, watching
D. watches, watches
结核性腹膜炎（）
A.利福平
B.糖皮质激素
C.奥美拉唑
D.柳氮磺氨吡啶
E.羟氨苄青霉素
