下列灯具中的照明线路中需要接入启动器辅助点燃的是（）。
A．碘钨灯
B．汞氙灯
C．高压汞灯
D．白炽灯
参考答案：B
—How are you?
—______ [ ]
A. How do you do?
B. Yes, I'm fine.
C. I'm fine, thanks.
D. How are you?
—What do you think of tomorrow’s football match?
—_____ difficult for us_____ the match.
A．We’re; to win
B．We’re; winning
C．It’s; to win
D．It’s; winning
