以下程序运行后的输出结果为( )
i=1
WHILE i<8
i=i+2
s=2*i+3
i=i﹣1
WEND
PRINT s
END
A:17
B:19
C:21
D:23
— Nora published her first poem when she was only seven!
— At seven? What a ! I knew few words at her age.
在图所示的电路中,闭合电键S,电路正常工作。一段时间后灯L熄灭,电路中只有一处故障,且只发生在灯L或电阻R上,则 ( )
下列诗句描绘的现象中,不属于生命现象的是 ( )