What can be learned from the passage?
A.Parents are unhappy with their growing children.
B.Parents have suitable ways to talk with their teenagers.
C.Parents should be patients with their silent teenagers.
D.Parents should try to understand their teenagers.
第2题
一种能综合完成铲土、装土、运土、卸土并能控制填土厚度等工序的土方工程机械是()。
A. 推土机
B. 铲运机
C. 挖掘机
D. 装载机
第4题
A.推土机推土,装载机装土,自卸汽车运土
B.推土机推运土方
C.挖掘机挖、装土,自卸汽车运土
D.铲运机铲运土方
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