蓄电池点火系的每一点火过程可以划分为三个阶段触点张开→触点闭合→火花放电。
参考答案：错
The price of this bicycle is quite _____. I don't have enough money to buy it. [ ]
A. low
B. rich
C. high
D. expensive
骨关节结核主要继发于
A．泌尿系结核B．淋巴结核C．肺结核D．消化道结核E．胸膜结核
