在用数码法（如473）标注电容时，凡用整数表示的，单位默认为（）。
A. pF
B. nF
C. F
D. μF
电容2P2代表的电容值是（）。
A. 22pF
B. 2.2pF
C. 22μF
D. 2.2μF
Which of the statistics does the man consider most significant?
A. The volume
B. The yield
C. The highs & lows
D. The P/E ratio
Which statistic would he look at if he wanted an investment to give him an income?
A. The volume
B. The yield
C. The highs & lows
D. The P/E ratio
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