如图所示，电路图上有A、B、C三个开关和一个小灯泡，闭合开关C或者同时闭合开关A、B，都可使小灯泡发光．现在任意闭合其中一个开关，则小灯泡发光的概率等于A． B． C． D．
Nice to meet you. A.Nice to meet you, too. B.Fine, thanks. C.How are you?
How old are you? A. I’m ten. B. Fine, thank you. C. How do you do?
This is an apple. It’s ______red. A. a B. an C. /
Is that ____eraser? A. your B. you C. yours
This is _____orange. A. an B. a C. this
B．
C．
D．
B． C． D．
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