提速道岔断相保护器DCBHQ输入电流为交流（）。
A、0.5A～2A
B、1A～3A
C、1A～3.5A
D、1A～4A
参考答案：C
Recently our government policymakers are very ________ about the rapidly rising food costs.[ ]
A.upset
B.confused
C.concerned
D.conscious
论 * * 组织形式的重要意义？
