太阳能电池的主要特性参数有哪些？
参考答案：
短路电流Isc、开路电压Voc、填充因子FF、效率η、输出功率Pm。
I don't think that his watch is ______.
A．worth the price
B．worthy the price
C．worthy to buy
D．worth of the price
自我意识
