保存水样的措施有（）A、选择适当材料的容器 B、控制溶液的Ph C、加入固定剂 D、冷藏或 发布时间：2018-10-21 20:52 │ 来源：www.tikuol.com 题型：多项选择题 问题： 保存水样的措施有（）A、选择适当材料的容器B、控制溶液的PhC、加入固定剂D、冷藏或冷冻
题型：多项选择题 完形填空。 A teacher started his first job at a primary school and wanted to make a good impression (印象) on the children. When he noticed a boy 1 all by himself, 2 the other children were playing football, he walked up to him and asked, "Are you alright?" The boy told him 3 was fine and the teacher left him. A few minutes later, 4 , he noticed that the boy was still standing alone and had not 5 he other boys. This time, the teacher decided to 6 what was wrong. He came up to the boy again and said, "Hi, are 7 you're not feeling left out? Would you like me to be your friend?" The boy 8 uncomfortable, but after a little hesitation (犹豫), he said, "Maybe". Encouraged by his progress, the teacher asked,"Tell me, 9 are you standing here alone?" "Because," the said with clear anger in his 10 , "I'm the goalkeeper." ( )1. A. standing ( )2. A. when ( )3. A. anything ( )4. A. so ( )5. A. helped ( )6. A. care about ( )7. A. angry ( )8. A. felt ( )9. A. what ( )10. A. noise B. sitting B. while B. nothing B. besides B. covered B. belong toB. sure B. replied B. why B. sound C. learning C. before C. everything C. except C. stopped C. find out C. happy C. bothered C. how C. voice D. laughing D. unless D. something D. however D. joined D. let down D. patient D. smiled D. where D. point 查看答案
题型：多项选择题 有关逸度和逸度系数的讨论，正确的是（）。A、对于真实流体，所有计算式都要用逸度代替压力 B、混合物的逸度系数与组成无关 C、纯物质的逸度和压力之比是逸度系数 D、逸度值与标准态的选取有关 查看答案
题型：多项选择题 各级政府主管部门不再把企业置于直接管理之下，并不等于完全放弃对企业经营活动的______和______。依次填入画横线部分最恰当的一项是______。A．管理 限制B．领导 控制C．引导 控制D．引导 制约 查看答案