直接信用控制的具体手段包括：规定利率限额与信用配额、信用条件限制，规定金融机构流动性

小红发现一种紫色的固体可以治疗观赏鱼的某些疾病，于是想探究该固体的成分．

[提出问题]该紫色固体的化学成分是什么？

[查阅资料]资料整理如下：

碘是一种紫黑色有光泽的固体，在微热下即升华，在空气中呈紫红色．碘难溶于水，易溶于酒精．

高锰酸钾是一种暗紫色的固体，溶于水，其水溶液呈紫红色．

[猜想与验证]

方案1：取少量该紫色固体放在试管中，加水，______（填现象）．

取用紫色固体时，为避免药品粘在试管口和试管壁上，采取的操作是______

方案2：取少量该紫色固体放在试管中，微微加热固体，没有明显变化．

方案3：用如图装置加热该紫色固体并收集一瓶气体．

反应的化学方程式是______．

实验结论：该紫色固体的化学成分是高锰酸钾．

[反思与评价]请选择一个你认为最好的方案，并说明理由．______．

“Can I see my baby?”asked the happy new mother. The bundle(婴儿包)was placed in her arms and when she moved the fold of cloth to look upon his tiny face, she gasped-the baby had been born without ears. Time, however, proved that the baby’s hearing was perfect except his appearance．

One day when he rushed home from school and threw himself into his mother’s arms，he cried out bitterly，“A boy, a big boy…called me－a f—…freak．”She sighed, knowing that his life was to be endless of heartbreaks．

He grew up，handsome for his misfortune．A favorite with his fellow students,he might have been class president,but for that．He developed a gift for literature and music．

The boy’s father had a talk with the family doctor．Could nothing be done?“I believe we could graft(移植)on a pair of outer ears，if they could he donated(捐献)，”the doctor decided．So the search began for a person who would make such a sacrifice(牺牲)for a young man．Two years went by．Then,“You’re going to the hospital，son．Mother and I have someone who will donate the ears you need．But it’s a secret．”said the father．

The operation was a brilliant success．His talents blossomed into genius．School and college became a series of successes．Later he married and entered the diplomatic(外交)service．“But I must know!”he urged his father．“Who gave so much for me? I could never do enough for him．”

“I do not believe you could,”said the father，“but the agreement was that you are not to know…not yet．”The years kept the secret,but the day did come …one of the darkest days that ever passed through a son．He stood with his father over his mother’s casket(棺材)．Slowly and tenderly，the father stretched forth a hand and raised the thick，reddish-brown hair to let out the secret．

41．The story is mainly about____________．

A．hew a boy had new ears through an operation

B．what a devoted parent privately did for the child

C．how a disabled boy turned into a useful person

D．why a donator made a sacrifice to a bright boy

42．From the first paragraph we know that the mother____________．

A．was determined to donate her ears to pedect her son

B．kept her husband unknown about the baby’s situation

C．felt shocked and disappointed to see her new baby

D．complained of her bad luck to have a disabled child

43．The underlined word“freak”in Paragraph 3 is the closest in meaning to“____________”．

A．slow—acting person                            B．ugly—looking child

C．badly—behaved student                D．strangely—shaped creature

44．What can be inferred from the passage?

A．The agreement was between the donator and the family．

B．The boy was so popular that he was made class president．

C．Finally the boy came to know who the donator was．

D．The mother donated her ears to her son after she died．

45．What moral lesson can we draw from this reading? A．Real love lies in what is done unknown rather than what is done known．

B．It is up to parents to help their children heart and soul．

C．True beauty lies only in the heart not in appearance．

D．It is a virtue for young generations to learn to be grateful．

简述教学评价应遵循的基本原则。

某贴片电容的实际容量是0.022µF，换成数字标识是（）。

A、202

B、223

C、222

D、224

合成排惰排放的是（）。

A.新鲜气

B.入合成塔循环气

C.出合成塔循环气

D.分离氨后循环气