折射式光电烟雾探测器接通测试电门时,灯的工作情况是:().
A.光标灯与测试灯同时点亮
B.光标灯不亮,测试灯点亮
C.光标灯点亮,测试灯不亮
D.光标灯与测试灯都不亮
参考答案:A
位于双足足背沿第4跖骨与第5跖骨之间延伸到骰骨的一带状区域的反射区是( )。
A.肩关节
B.肩胛骨
C.膝关节
D.肘关节
With respect to capital project, if the discount rate decrease, which of the following about the internal rate of return (IRR) and net present value (NPV) are most accurate()
A. Both IRR and NPV increase.
B. IRR remains unchanged and NPV increases.
C. Both IRR and NPV remain unchanged.