新型机械化竖窑，窑体出灰系统三段挡板工作能力为（）t/d。
A、125
B、134
C、150
D、160
参考答案：D
Amy’s parents have to work this Sunday, so she is ______ her little brother. [ ]
A. keeping
B. finishing
C. babysitting
D. leaving
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