今有甲、乙、丙三瓶等体积的新制氯水,浓度均为0.1 mol·L-1。如果在甲瓶中

题型:选择题

问题:

今有甲、乙、丙三瓶等体积的新制氯水,浓度均为0.1 mol·L-1。如果在甲瓶中加入少量的NaHCO3晶体(m mol),在乙瓶中加入少量的NaHSO3晶体(m mol),丙瓶不变。片刻后,甲、乙、丙三瓶溶液中HClO的物质的量浓度的大小关系是(溶液体积变化忽略不计(    )

A.甲=乙>丙

B.甲>丙>乙

C.丙>甲=乙

D.乙>丙>甲

考点:氯气氯气用于自来水消毒杀菌氯的其他化合物(高氯酸、氯化物、氯酸盐,盐酸等)漂白粉、漂粉精
题型:选择题

Does eating a good breakfast improve school study? More than 1,000 students in the city of Lawrence took part in an experiment (试验) a year ago, and the answer is YES. In the experiment, students with breakfast got high scores in their tests than those without breakfast. Among those with breakfast, fewer were late for school and much fewer missed their school. “By eating breakfast, you feel active in your morning study and keep good health,” says Amy Sampson, a famous doctor. He did the experiment for a year.

Students without breakfast may lose important nourishment (营养) in eggs, fruit, bread and so on. So try to get your kids to have breakfast so that they can feel well, keep strong and do their best in the school work.

根据短文内容,判断下列句子的正 (T) 与误 (F)。

小题1:Over 1,000 students took part in the experiment.

小题2:It’s good for students to have some eggs, fruit, milk, bread and so on for their breakfast.

小题3:The passage tells us that a good breakfast will help students to get more scores.

小题4:Amy Sampson did the experiment for two years.

小题5:The best title for this passage may be “Breakfast or Not”.

题型:选择题

对特定的项目、产品、过程或合同,规定由谁及何时应使用哪些程序和相关资源的文件,是指______。

A.质量策划

B.质量改进

C.质量控制

D.质量计划

题型:选择题

急性心衰时不可能发生的代偿是()

A.心率↑

B.心脏扩张

C.交感神经兴奋

D.血液重新分配

E.心肌肥大

题型:选择题

可快速去除车漆面八成水分,减少抹车时间,给车漆带来光亮的效果是以下哪种()

A.亮光排水剂

B.礠土润滑剂

C.高浓缩洗车香波

D.泥土松弛剂

题型:选择题

设有消防器材及设施的地域及消防通道安全出口,严禁堆放商品等物,保证()。

A.清洁

B.畅通

C.低温

D.潮湿

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