某日傍晚，气温从中午的零上5°C下降到零下1°C，气温下降了______° C．

关于制作装片时对标本的染色，不合适的是[ ]

A．在盖玻片的一侧滴染液，在另一侧用吸水纸吸干

B．可以重复2～3次

C．为了能看清楚，所用的染液颜色越深越好

D．染色后用干净的吸水纸或纱布将玻片标本擦拭干净

龙骨丸2功效与作用

第二节完形填空(共20小题；每小题2分，满分40分)

阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。

About 10 years ago my daughter studied in Ayrlie Beach, about 2 500 kilometers from Newcastle. She rang me one day crying because of an emotional trauma(创伤) she was16. She told me that she needed17, and my arms around her would be the best thing!18I couldn’t do that at that exact moment, I asked her to describe her19to me and told her that if she hadn’t heard from me in about 30 minutes she should20me back.

After21up the phone, I just sat for a few seconds. After only a very short time a phone number22into my head. I rang the number and it was a23who had bought a house from me about 18 months before, when I24in Real Estate. To my surprise, my25words to her were these, “Oh, it’s you Liz, I have no idea26I’m calling you in particular, but my daughter is in27in Ayrlie Beach, and I just got the28to ring you and tell you that. Have you any idea why?”

“It could be because my29lives there,” says Liz.

“Oh really, that’s got to be it,” I said. “Do you30giving me his phone number, Liz?”

“Of course not, and I can only hope that he can be31!”

Liz gave me his mobile number and I rang straight away. 32, he answered immediately, and I told him the33of who I was, and why I’d rung.

I gave him the34of the place where my daughter was standing; and that she needed emotional support if he could find it in his heart to help out so unexpectedly like this.

“Oh yes, I can go and35her,” he said... “She’s right across the street from where I’m standing!” He walked across the street and told my daughter that her Dad had sent him to help her!

16.A.curing           B.facing         C.finding               D.treating

17.A.food              B.money        C.support                     D.clothes

18.A.If                  B.When          C.Whether             D.Because

19.A.surroundings  B.feelings       C.difficulties      D.problems

20.A.pay               B.send            C.follow                D.ring

21.A.hanging         B.looking              C.talking               D.putting

22.A.walked          B.jumped              C.divided                     D.turned

23.A.girl               B.man            C.woman               D.boy

24.A.visited           B.stopped       C.appeared            D.lived

25.A.kind              B.sweet          C.funny                 D.exact

26.A.how                     B.where         C.why                   D.what

27.A.silence           B.trouble        C.surprise              D.danger

28.A.thought         B.strength       C.decision             D.permit

29.A.son               B.daughter      C.husband             D.sister

30.A.mind             B.kind            C.sweet                 D.funny

31.A.brave            B.helpful        C.valuable             D.important

32.A.Clearly          B.Surely         C.Fortunately         D.Unluckily

33.A.story             B.trick           C.news                  D.lesson

34.A.examination   B.description  C.expression          D.condition

35.A.like               B.know          C.see                     D.punish

氯酸钾和二氧化锰的混合物共15g，在试管中加热至完全反应，冷却后称量，剩余固体质量为10.2g，计算剩余固体中二氧化锰的质量．（相对分子质量：KClO₃-122.5  MnO₂-87  KCl-74.5）

阅读下列说明，回答问题1和问题2，将解答填入对应栏内。

[说明]

假设某大型商业企业由商品配送中心和连锁超市组成，其中商品配送中心包括采购、财务、配送等部门。为实现高效管理，设计了商品配送中心信息管理系统，其主要功能描述如下：

(1)系统接收由连锁超市提出的供货请求，并将其记录到供货请求记录文件中。

(2)在接到供货请求后，从商品库存记录文件中进行商品库存信息查询。如果库存满足供货请求，则给配送处理发送配送通知；否则，向采购部门发出缺货通知。

(3)配送处理接到配送通知后，查询供货请求记录文件，更新商品库存记录文件，并向配送部门发送配送单，在配送货品的同时记录配送信息至商品配送记录文件中。

(4)采购部门接到缺货通知后，与供货商洽谈，进行商品采购处理，将合格商品入库，并记录采购清单至采购清单记录文件中，向配送处理发出配送通知，同时通知财务部门给供货商支付货款。

该系统采用结构化方法进行开发，得到待修改的数据流图(如图15-19所示)。

图15-19中存在4处错误的数据流，请指出各自的起点和终点；若将上述4条错误的数据流删除，为保证数据流图的正确性，应补充3条数据流，请给出所补充数据流的起点和终点。(起点和终点请采用数据流图15-19中的符号或名称)