氨苄西林加入含乳酸根的复方氯化钠注射液中会（） A.产生沉淀 B.产生变色 C.效价

化学帮助人类创造和合成各种具有特定性能的材料，如聚甲基丙烯酸甲酯（PMMA）,其单体为MMA，工业上可用于制造透明的有机玻璃，医学上可用来作为防止解剖器官腐蚀的涂层，如用于心脏冠状动脉的防腐。以下提供了两条制备MMA的途经，流程如下：已知B为一种不饱和烃，核磁共振谱上共有四个峰，C的相对分子量为70，氧的含量为22.85%。

（1）①的反应类型为____________；PMMA结构简式为_______________；

（2）推测得B的结构简式为_____________；C所包含的官能团名称为_____________；

（3）写出由C制备MMA的反应方程式：_____________________； 

（4） 有多种同分异构体，写出符合下列条件的同分异构体 _________；

 ①能够发生银镜反应 ②能与氢氧化钠溶液反应  ③核磁共振谱上有4个峰

（5）设计合成路线由C制备目标产物，写出设计的流程图，注明试剂和条件     

南希女士为法国公民，因一起民事纠纷在中国法院进行诉讼，法院应当（）

A.为其免费聘请翻译人员

B.使用法语进行诉讼

C.允许法国律师出庭诉讼

D.为其聘请翻译人员但由其承担费用

设备负责人的职责有（）.

A.负责组织机械设备的使用、维修、保养，满足施工生产的需要。

B.负责现场机械设备的配件采购计划及采购工作。

C.参与机械事故调查，组织修复，提出防范措施，并写出书面材料及时上报。

D.指导使用人员按照使用说明书的要求和设备安全技术操作规程使用、保养设备。

不属于创造能力特点的是（）。

A、灵活性

B、发散性

C、独特性

D、流畅性

About fifty years ago, plant physiologists set out to grow roots by themselves in solutions in laboratory flasks. The scientists found that the nutrition of isolated roots was quite simple. They required sugar and the usual minerals and vitamins. However, they did not require organic nitrogen compounds. These roots got along free on mineral inorganic nitrogen. Roots are capable of making their own proteins and other organic compounds. These activities by roots require energy, of course. The process of respiration uses sugar to make the high energy compound ATP, which drives the biochemical reactions. Respiration also requires oxygen. Highly active roots require a good deal of oxygen.
The study of isolated roots has provided an understanding of the relationship between shoots and roots in intact plants. The leaves of the shoots provide the roots with sugar and vitamins, and the roots provide the shoots with water and minerals. In addition, roots can provide the shoots withorganic nitrogen compounds. This comes in handy for the growth of buds in the early spring when leaves are not yet functioning. Once leaves begin photosynthesizing, they produce protein, but only mature leaves can "export" protein to the rest of the plant in the form of amino acids.

The underlined word "intact" in Paragraph 2 is closest in meaning to ______.

A．mature

B．wild

C．whole

D．tiny