| Trees are useful to man in three
important ways: they provide him with wood and other products; they give him
shade; and they help to prevent droughts and floods. Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. (78) {{U}}In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. {{/U}}And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear. This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil--allowing the rain to sink in--and also bind the soil, thus preventing it from being washed away easily; but where there are no A. Because nothing remains on land except floods. B. Because there are no longer trees to keep the rain and protect the top-soil. C. Because too much rain sinks in and washes away the top-soil. D. Because roots of the trees break up the soil. [判断题]线路电压越高,负荷电流越大,则潜供电流越大。( )
A.正确 B.错误 [多选题]根据《建设工程安全生产管理条例》，下列说法正确的是（）。
A.在城市的建设工程，施工单位可以对施工现场不实行封闭围挡 B.在城市市区内的建设工程，施工单位应当对施工现场实行封闭围挡 C.施工单位不得在尚未竣工的建筑物内设置员工集体宿舍 D.施工单位可以在尚未竣工但已经监理工程师检验合格的建筑物内设置员工集体宿舍 E.施工现场暂时停止施工的，应当由建设单位做好现场防护，所需费用由责任方承担，或按照合同约定执行 [单选题]电话闭塞法时，如果区间（包括站台限速40km/h）有限速，运行速度超过限速，副司机要及时提醒正司机进行减速，如果运行速度超过限速（ ）km/h，须立即按下紧急停车按钮。
A.3 B.5 C.10 D.15 [单项选择]我国的环境影响评价首先是从( )领域开始的。
A. 环境质量评价 B. 规划环境影响 C. 噪声环境影响 D. 建设项目 [多选题]（ ）侧（ )更换电能表时，直接接入的电能表应将出线负荷断开，应有防止相间短路、相对地短路、电弧灼伤的措施。对于不具备电能表接插件的三相直接接入式计量箱，其三相直接接入式电能表装拆应停电进行。
A.电源侧 B.负荷侧 C.停电 D.不停电 [判断题]人民检察院决定逮捕犯罪嫌疑人、被告人的，由人民检察院执行。( )
[多选题]下列各项表述中，说法正确的有（ ）。
A.同一控制下的企业合并是指参与合并的企业在合并前后均受同一方或相同的多方最终控制且该控制并非暂时性的 B.一般情况下在合并对价分摊的评估中，以被购买方各项资产公允价值为权重计算的加权平均资本回报率，应该与其加权平均资本成本基本相等或接近 C.成本法较少运用于企业无形资产的评估 D.市场法一般不作为无形资产的首选评估方法 E.期权的持有者必须行使该权利 [判断题]更换液压油时须彻底清洁油箱,油箱盖打开后要注意盖好,严防水份、灰尘、铁屑等杂物混入油液( )
A.正确 B.错误 我来回答: 提交
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