小王以每股3元的价格购买某公司股票，该股现以15元的价格卖出，他的收入可通过执行限价

某饮料的配料有如下说明：配料：纯净水、白砂糖、鲜橙浓缩汁、柠檬酸、维生素C、食用香精 鲜橙原汁含量≥10％ 净含量：500mL

（1）该配料中能为人体的生命活动提供能量的物质是什么？除配料中所涉及的营养物质外，人体必需的营养物质还有哪些？（列出2种即可）                                                                        

（2）推测该饮料可能的酸碱性及其依据，并设计简单的实验进行检测。（答出实验所需要的试剂或用品即可）                                                                                     

（3）维生素C片保存时，应注意避热、避光、密封，据此可推测维生素C的具有什么化学性质？

短文填词。

     I have four good (1)f           . They're Jennifer, Victor, Cindy and Leila. We are in the (2)s          

 (相同的) class. So we're (3)c            (同班同学), too. Jennifer swims very well, she wants to join

the (4)s            club. Then she can swim on (5)S            or Sundays. Victor wants to join the art club

because he is good at (6)p           . Cindy is a pop music fan. She can sing a lot of (7)s           . So she

wants to join the (8)s            club. Leila wants to join the music club because she (9)p            the violin

very well. And she wants to be a (10)m            when she grows up (长大). I like them.

为将由于咨询工程师工作疏忽或过失给他人带来的损失转由保险公司承担，工程咨询单位应为咨询工程师办理（）。

A．职业责任保险

B．附加承保责任保险

C．产品责任保险

D．雇主责任保险

防治香蕉枯萎病的措施是（）？

A、加强检疫

B、推广种植无病组培苗

C、定期检查蕉园，发现零星病株应及时清除销毁，并撒施石灰或石灰氮处理土嚷

D、防止耕作机械和劳动工具的交叉传播

波浪的搬运作用