下述哪一项是维生素D缺乏性佝偻病时骨样组织堆积的表现（） A.手镯 B.漏斗胸 C.

某校化学兴趣小组就空气中氧气的含量进行实验探究：

【集体设计】化学兴趣小组的同学经过研究讨论后，采用燃烧方法除去氧气后，测定剩余气体的体积．但首先需要解决两个实际问题

（1）要能确保消耗其中的氧气，使气体的体积减小，选择什么样的药品就显得很重要．他们应该选择下列物质中的（填编号） _________ ．

A．蜡烛           B．红磷           C．硫粉          D．木炭

（2）药品的取用量也有相应要求．你认为取用量应达到什么要求？ _________ ．

【设计实验】第一小组同学共同设计了如图的A、B两套装置．

（3）你认为合理的是（填编号） _________ ．

（4）为了确保实验的成功，在装药品之前应该先检查 _________ ．

（5）集气瓶中所选择物质燃烧反应的反应表达式是 _________ ．

【改进实验】第二小组同学查阅资料得知：白磷不溶于水，露置在空气中容易发生缓慢氧化而引起自燃，而燃烧产生的五氧化二磷会刺激人的呼吸道．于是他们将试管的容积分成五等份，做好标记（如图C）．在试管中加入一小块（足量）白磷，迅速用橡皮塞塞紧试管口，将试管放入热水中，使白磷燃烧．待白磷熄灭并冷却到室温后，再将试管倒立于盛有水的水槽中，并在水中将橡皮塞取下．

（6）此装置的优点是（任写两点）① _________ ；② _________ ．

（7）小组A同学用镊子从容器中取出白磷后，准备在滤纸上切割时，B同学立刻阻止了他，指出他的操作不正确，请分析原因 _________ ．

男，20岁。因发热伴明显头痛、呕吐2天，神志恍惚半天，于1月5日来诊。1个月前由外地前来打工，生活条件差。查体：T39.5℃，P120次／分，BP130／80mmHg，神志恍惚，烦躁，皮肤散在皮疹，压之不褪色，颈抵抗，Kenug征（+），实验室检查：血WBC21×10⁹／L，N0.89；CSF检查：压力200mmH₂O，有核细胞25000×10⁶／L，多核0.95，蛋白升高，糖、氯化物降低，首先考虑的诊断应是（）。

A.结核性脑膜炎

B.隐球菌性脑膜炎

C.流行性脑脊髓膜炎

D.病毒性脑炎

E.乙型脑膜炎

阅读理解。

     In bringing up children, every parent watches eagerly the child's acquisition of each new

skill-the first spoken words, the first independent steps, or the beginning of reading and writing.

It is often tempting to hurry the child beyond his natural learning rate, but this can set up

dangerous feelings of failure and states of worry in the child. This might happen at any stage.

A baby might be forced to use a toilet too early, a young child might be encouraged to learn

to read before he knows the meaning of the words he reads. On the other hand, though, if a

child is left alone too much, or without any learning opportunities, he loses his natural enthusiasm

for life and his desire to find out new things for himself.

     Parents vary greatly in their degree of strictness towards their children. Some may be

especially strict in money matters, others are severe over times of coming home at night or

punctuality for meals. In general, the controls imposed represent the needs of the parents and

the values of the community as much as the child's own happiness.

     As regards the development of moral standards in the growing child, consistency is very

important in parental teaching. To forbid a thing one day and excuse it the next is no foundation

for morality (道德). Also, parents should realize that "example is better than precept". If they

are not sincere and do not practice what they preach (说教),their children may grow confused

and emotionally insecure when they grow old enough to think for themselves, and realize they

have been to some extent fooled.

     A sudden awareness of a marked difference between their parents' principles and their

morals can be a dangerous disappointment.

1. Eagerly watching the child's acquisition of new skills         .

A. should be avoided

B. is universal among parents

C. sets up dangerous states of worry in the child

D. will make him lose interest in learning new things

2. In the process of children's learning new skills parents          .

A. should encourage them to read before they know the meaning of the words they read

B. should not expect too much of them

C. should achieve a balance between pushing them too hard and leaving them on their own

D. should create as many learning opportunities as possible

3. The second paragraph mainly tells us that         .

A. parents should be strict with their children

B. parental controls reflect only the needs of the parents and the values of the community

C. parental restrictions vary, and are not always enforced for the benefit of the children alone

D. parents vary in their strictness towards their children according to the situation.

4. The underlined word"precept" in Para.3 probably means"         "

A. idea    

B. punishment        

C. behaviour        

D. instruction

5. In moral matters, parents should         .

A. observe the rules themselves

B. be aware of the marked difference between adults and children

C. forbid things which have no foundation in morality

D. consistently ensure the security of their children

零售企业的利润目标通常表现在哪几个方面？

储蓄账务的记账规则是什么