如图所示,在〇里填上适当的电表符号,当电键S闭合时,各用电器都能正常工作.
Where do you work now? I work in a cinema .
Where do you study now? I work at Sunny School
已知正项等比数列{an}满足:a7=a6+2a5,若存在两项am,an,使得 aman =4a1,则 1m + 16n 的最小值为( )