建筑材料按其基本成分可分为()。
{{B}}A Thirsty World{{/B}} The world is not only hungry; it is also thirsty for water. This seems strange to you, since nearly 75% of the earth’s surface is covered with water. But about 97% of this huge amount is from sea-water, or salt water. Man can only drink and use the other 3%—the fresh water that comes from rivers, lakes, underground, and other sources. And we cannot even use all of that, because some of it is in the form of iceberg (冰山) and glaciers (冰川). Even worse, some of it has been polluted. At the moment, this small amount of fresh water is still enough for us. However, our need for water is increasing rapidly. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage l A. "man" B. "you" C. "woman" D. "they" [判断题]被吸附的物质分子只是固定下来,并没有发生化学变化,所以称为个人吸附。( )
A.正确 B.错误 [判断题]系统误差影响观测值的准确度,偶然误差影响观测值的精密度。【该题涉及6.2内容】
A.正确 B.错误 [单项选择]25岁初次妊娠妇女,足月,规律宫缩8小时,宫口开大6cm,S+1,胎膜已破。2小时后肛查:宫口仍6cm,边薄,先露S+1,宫缩力弱,20次/5~6分。产程异常的类型为()
A. 潜伏期延长 B. 活跃期延长 C. 活跃期停滞 D. 第二产程延长 E. 第二产程停滞 [判断题]蒸汽管线进行暖管操作时,在阀门开关顺序上,应先将管线低点排凝阀打开,后开蒸汽阀。
[单选题]细胞水肿和脂肪变性常发生在:
A.肺、脾、肾 B.心、脾、肺 C.心、肝、肠 D.肝、肾、脾 E.心、肝、肾 [判断题]油炸类食品常常使用棕榈油,是因为棕榈油含有较多的饱和脂肪酸,耐热性好,油炸不易变糊变黑。
A.正确 B.错误 [判断题] 各车站之间的物资借用须做好物资借用登记,按要求填记《车站物资借用登记表》
A.正确 B.错误 [判断题]案例81 某35kV线路更换25号杆绝缘子,作业人员没有使用防脱装置的双钩丝杠作业,将安全带腰绳系在双钩丝杠上,未使用后备保护绳,松落了1串瓷质绝缘子,松丝杠时未保留有效丝杠长度,未采取防止导线脱落的后备保护措施,丝杠松尽突然脱落,作业人员失去保护坠落。
该起事故存在违章行为:没有使用防脱装置的双钩,未保留有效丝杠长度。违反《安规》关于“作业现场的生产条件、安全设施、作业机具和安全工器具等应符合国家或行业标准规定的要求”的规定。
A.正确 B.错误 [简答题]简述“三舍法”的主要内容。
[多项选择]构成领导权力影响力的要素有()。
A. 资历 B. 职位 C. 智力 D. 传统 我来回答: 提交
|