在室温25℃,大气压为100015Pa时,去取气体试样100mL,换算为标准状况下的气体体积为多少毫升?
参考答案:
He often tells the children _______ when they play water sports.[ ]
A. be careful
B. to be careful with
C. to be careful
D. not be careless
如何检查电源故障。()
A、观察明显坏件
B、测量输入电阻
C、测量输出电压
D、检查辅助电路