规范规定，陶瓷锦砖的脱纸时间不得______。A．小于30min B．大于30min

任务型阅读

Pollution problems are becoming more and more serious. One of them is called “white pollutions” caused by plastic, such as shopping bags, boxes and cups. In China, about three billion plastic shopping bags are used every day, which results in a great waste of resources(资源) and heavy environment pollution. Luckily, the government has stopped us from using free plastic bags, telling all stores and supermarket not to provide customers(顾客) with free plastic bags since June 1,2008. From then on, people have been supposed to use cloth bags and shopping baskets instead of plastic bags in order to protect our environment.

Now, more and more people have realized the importance of using the cloth bags and shopping baskets. For one thing it can protect our environment, for another it can also save energy. Yet we have more things to do to solve the problem of “white pollution”!

小题1:Is “white pollution” caused by plastic?

__________________________________________

小题2:How many plastic shopping bags are used every day in China?

_____________________________________________

小题3:What are the advantages of using cloth bags or shopping baskets？

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女性，44岁。黄疸，食欲不振，体重减轻已3个月，皮肤黄染，肝大，胆囊可触及，外院血检，TB180μmol/L，AKP（碱性磷酸酶）45U（金氏单位），ALT（SGPT）26U。

首选的检查方式为（）。

A.B超

B.CT

C.DSA

D.核素扫描

E.血CEA

患者王先生，50岁，半天来呕血4次，量约1200ml，黑便2次，伴头晕、心悸。入院查体：BP60／45mmHg心率180次／分，巩膜黄染，腹部膨隆，移动性浊音阳性。诊断为肝硬化食管静脉曲张破裂出血。

此患者目前最主要的护理诊断为（）。

A.组织灌注量改变

B.知识缺乏

C.有感染的危险

D.有皮肤完整性受损的危险

E.恐惧

成熟B细胞的标志是（）。

A.IgG

B.IgA

C.IgM

D.IgD

E.IgE

(9分) 已知>C=C<可被酸性高锰酸钾溶液氧化成二元醇，如：

现以甲基丙烯为原料合成有机玻璃和环状化合物E(C₈H₁₂O₄):

(1) 试写出下列的结构简式:

B ______________ C _____________ E _______________

(2) 反应方程式:

B → E ________________          _____________________________；

B → C __________________          ___________________________；

C → D ________________          _____________________________。