忙时试呼次数—BHCA是衡量（）的重要参数。
参考答案：呼叫处理能力
--I can’t solve the math problem because it is too difficult. What should I do?
-- _________ ask the teacher for help?
A．How about
B．What about
C．Why don’t you
D．Why not you
请你辨析(10分。仅作判断不说明理由者不得分)
