空调关机后运行灯为什么会有时闪有时不闪？
参考答案：
这和空调检测到的电源情况有关（比如关机后停电或电源波动较大时），此为正常范畴。
—Excuse me, could you tell me ________?
—There is a bank on the second floor. You can make it there.
A．where I can exchange money
B．how I can get to the bank
C．if there’s a bank near here
D．where the bank is
观测场内仪器之间，南北间距为（）m。
A、3
B、≥3
C、4
D、不少于4
