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【单选题】
听力原文：W: This lake is so wide that you can't see the other side. M: I wouldn't want to try to swim across it. Q: What does that man mean? (13)A.
He wants to swim across the lake.
B.
He doesn't think she can see very well, either.
C.
He doesn't know why she wants to swim.
D.
He thinks the lake is wide, too.
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反馈参考答案：
举一反三
【多选题】关于TMR0 定时计数器以下说法正确的是
A.
TMR0赋值启动后不再停止
B.
TMR0主循环不能使用睡眠
C.
TMR0可以执行计数和定时两种功能
D.
中断服务程序中TMR0赋初值不会造成定时误差
E.
TMR0前分频比可以从1-256依次递增
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