利用下图装置可以模拟铁的电化学防护。下列说法不正确的是 [ ] A．若X为锌棒，

纤维素细胞壁

A．加间苯三酚和盐酸试液，显红色或紫红色

B．加碘液显棕黄色，加硝酸汞显砖红色

C．加碘液显蓝色或紫色

D．加氯化锌碘显蓝色或紫色

E．加硫酸无变化

女，35岁，查体B超发现子宫多发占位，无明显临床症状。

本病需与下列哪种疾病鉴别（）

A.宫颈癌

B.退变型子宫肌瘤

C.卵巢肿瘤

D.盆腔内炎性肿块

E.子宫体癌

F.子宫腺肌病

阅读理解

     Is early childhood education really necessary?Early childhood education primarily focuses on learning

through playing to develop the child's physical, sensory, communicational and social development.Early

childhood education has become a concern of the government, who pushes poor children to be formally

trained before they are old enough for kindergarten.

     There are good reasons for the government to push early childhood education.Studies have shown

that orphaned children who did not receive good care and education become developmentally delayed

causing failure in school, and even in life.Further studies show that poor children who take part in Head

Start programs are more prepared for school, less likely to end up in Special Education classes, and are

less likely to receive public help or go to prison.

     There are also negative parts to putting a child in formal education programs too early.Time Magazine online explains that "the younger the child the less his chances of catching up with firstgrade work." I have

personally witnessed many children of my generation who went to Head Start programs become

frustrated and bored with school before they finished high school.Yet parents have been sure that the

earlier the child starts school, the better off he or she is, so they push to start children earlier.

     Actually while early formal education of poor children does show great gains in the early elementary

years, studies also show that this head start is really a "false start", as the gains are lost in middle and high

school years.It seems that environment is a bigger factor on life's success than early education.Head Start

programs have not achieved its original goal in closing the achievement gap in poor and middle school

children.Perhaps it is time to find other ways to close that gap.

1. The purpose of the government valuing the early childhood education is ________.

A. to develop the children's communication

B. to give orphaned children good care and education

C. to get the children prepared for the kindergarten

D. to train the children formally and regularly

2. According to the studies, which of the following is TRUE?

A. Children with good early education may have a rich life.

B. The orphaned children are usually unhappy in their life.

C. Children without early education can do well at school.

D. Head Start programs are helpful to the poor children.

3. "the younger the child the less his chances of catching up with firstgrade work." suggests that ______.

A. the early childhood education is helpless to the child's grade

B. it is good for the young children to receive early education

C. the early education can help the children follow the grade

D. the younger the children are, the cleverer they will be

4. The author's attitude toward the early childhood education is ________.

A. puzzling        

B. negative

C. indifferent  

D. proving

5. The main idea of the last passage is that ________.

A. the early childhood education is very necessary

B. Head Start programs have helped the children a lot

C. environment is the most important to life's success

D. better ways should be found to help the poor children

涤纶的化学名称为（），它是由单体（）、（），经线性缩聚聚合制得的。

如果把一些中国象征只是当作“元素”，就有点儿像把文化和传统当作装饰性的小挂件，看上去______，但“如七宝楼台，炫人眼目，碎拆下来，不成片段。”
填入划横线部分最恰当的一项是( )。

A．五彩缤纷

B．富丽堂皇

C．林林总总

D．包罗万象