搜题请搜索小程序“爱下问搜题”
问题 问答题 简答题

无机盐对于机体生理有何作用？

答案

参考答案：

1、构成细胞的组成成分

2、作为酶的活性基部分和酶的激活剂

3、调整细胞渗透压、酸碱度、氧化还原电位和能量转移

4、对于个别微生物还可以提供能量

阅读理解
阅读下面短文，根据所给语境，仿照示例E. F.将A-D分别填在空白处，使标题与内容相匹配。

                               __F__
     Sometimes, you don't pass the exam, It
 doesn't matter. A person is never perfect (完美的).
 Sometime she also does some terrible
 things.		                                  __E__
     Many people like animals and take them as
 their pets (宠物), Pet hospitals are very busy.
 Kind persons who love animals are needed to
 work in busy animal hospitals. They will teach you
  how to do the job.
                                  __1__
      Don't do today's things tomorrow
 the day after tomorrow. If the class is held
 up (耽搁),
 it's difficult to keep up with others.		                                       __2__ 
      When we learn English, we should use it as
  much as possible. We should read more, speak 
 more, listen to English from time to time and
 practice writing every day.
                               __3__       
     First, we should eat more fruits and
 vegetables, And also we need to eat a 
balanced diet. Second,
 we should do some exercise. Third,
 should get up early and go to bed early.		                                         __4__       
     If you last grade was a D, you should work hard for a C.
 Always think: I'll
 speak in class five times this week, or I'll remember
 twenty English words a day.
A. Do today's work today                     
B. How to keep healthy
C. How to learn English well                  
D. Set goals（目标）
E. Assistants needed in pet hospitals      
F. Keep hopeful
查看答案
单项选择题

根据《水利水电建设工程验收规程》(SL 223—1999)，在竣工验收前已经建成并能够发挥效益，需要提前投入使用的单位工程，在投入使用前应进行投入使用验收。投入使用验收由( )主持。

A．承包单位

B．项目法人

C．分部验收主持单位

D．竣工验收主持单位
查看答案