Trees should only be pruned (修剪) when
there is a good reason for doing so. Many gardeners believe that more damage
results from doing it unnecessarily than from leaving the tree to grow in its
own way. First, pruning may be done to make sure that trees have a desired shape. The object may be to get a tree of the right height, and to help the growth of small side branches which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut out diseased or dead wood, or branches that are rubbing against each other and thus causing wounds. A tree may grow healthier by removing the branches that are locking up the centre and so preventing the free movement of air. One result of pruning is that an open wound is left on the tree and this provides an easy entry (进入) f A. damage the tree B. heal itself C. cause the disease D. give the tree a desired shape [单项选择]劳动报酬:是指劳动者因提供劳动而获得的所有报酬的总和,它等于工资和福利之和。
根据以上定义,下面哪种组合不构成劳动报酬:( ) A. 小王超额完成计件任务500件,按单价10元计,公司付给他5000元人民币 B. 小王超额完成任务,公司除发一定数目的工资外,给了他两周的带薪假期 C. 小王把公司发的5000元用来购买股票,获得了2000元的收益 D. 小王完成任务后又加班工作了4小时,公司付给他400元的加班费 [单选题]体现教师职业与其他职业根本不同的是( )。
A.教书育人 B.为人师表 C.奉献性 D.长久性 [多选题] 各类作业人员应被告知其作业现场和工作岗位存在的()。
A. 危险因素 B. 防范措施 C. 事故紧急处理措施 D. 福利待遇及岗级 [单选题]工程网络计划中,对关键线路描述正确的是( )。
A.双代号网络计划中由关键节点组成 B.单代号网络计划中时间间隔均为零 C.双代号时标网络计划中无虚工作 D.单代号网络计划中由关键工作组成 [判断题]电能表、采集终端装拆与调试时,宜断开各方面电源(含辅助电源)。若不停电进行,应做好绝缘包裹等有效隔离措施,防止误碰运行设备、误分闸。
A.正确 B.错误 [多选题]( )储罐燃烧可能发生沸溢、喷溅。
A.汽油 B.煤油 C.柴油 D.原油 E.重油 [单选题]电缆试验结束,应对被试电缆进行( ),并在被试电缆上加装临时接地线,待电缆尾线接通后才可拆除。
A.A.短路 B.B.开路 C.C.接地 D.D.充分放电 E.略 F.略 G.略 我来回答: 提交
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