问题 选择题

最近,国际上提出的“绿色化学”是指化学工业生产中(  )。

A.对废水、废气、废渣进行严格处理

B.化学生产中不排放任何有害物质

C.化工厂及周围种草、种树、种花,使工厂成为花园式工厂

D.以绿色植物为原料,以生物催化剂实现化工生产过程的化学

答案

答案:B

绿色化学的研究重点有四个:一是选用对人类健康和环境危害小的、淘汰有毒的反应起始物(原材料);二是选择最佳的反应(生产)条件,以实现最大限度地节能和零排放;三是研究最佳的转换反应和良性的试剂(含催化剂);四是合成对人类健康和环境更安全的目标化合物(最终产品)。

阅读理解

阅读下面短文,根据所给语境,按要求完成下列各题。

    In 1996, 39 American children started a very interesting project (计划)-the Green Tree Project. The

students began the project by gathering walnuts (核桃) in autumn. The nuts were buried in cages in the

school garden in mid-November. (1)In this way, the seeds (种子) could be kept cool and moist (潮湿)

for several months before they started growing.

    In February, the seeds were dug up, so they could begin to sprout (发芽). Sprouted seeds were kept

in fridges, so they could be stopped from growing until the time to plant. (2)This helped keep the trees

about the same size at planting time. In March, sprouted seeds were planted in paper soft drink cups.

Each student was asked to plant 12 trees. (3)Then the trees were carefully watered and watched. The

first walnut trees began to appear in about a week…

    On April 29th, the trees were transplanted (移植) to the lake. (4)It took the children only 90 minutes

to plant all the trees. It was so interesting to see a treeless area turn into a forest right before their eyes.

1、将1、2处的英文翻译成汉语。 

     (1)                                                                                                                                                            (2)                                                                                                                                                        

2、将3处的句子改写成主动语态形式。 

                                                                                                                                                             

3、将4处的句子用同义句改写。 

                                                                                                                                                      

单项选择题