成分
Newly-born babies _____ in hospital.
Newly-born babies \_\_\_\__ in hospital.
The noise has to be broken down into its _____ parts for analysis.
The noise has to be broken down into its \_\_\_\__ parts for analysis.
滤波电路的主要任务是尽量滤掉输出电路中的交流成分,同时,尽量保留其中的直流成分。
滤波电路的主要任务是尽量滤掉输出电路中的交流成分,同时,尽量保留其中的直流成分。A