网上招标支付平台支持的账户类型包括（）
A．借记卡
B．准贷记卡
C．企业支票户
D．贷记卡
参考答案：A, B, C
The child asked his mother ______ go out to play tennis.
A．that he could
B．if he could
C．if could he
D．that could he
提高汽油收率须采取什么措施？
