搜题请搜索小程序“爱下问搜题”
问题 单项选择题

CRH2型动车组一等座车座椅没人有效宽度为（）。

A、465mm

B、475mm

C、455mm

D、485mm

答案

参考答案：B

阅读理解
阅读理解
       What hobbies or interests do you have? Do you like reading stories or writing novels(小说)? Do you
like learning something about the world? Do you like making music or drawing pictures? By knowing what
kind of things you like, you can choose the right job for your personality(个性). If you like reading or
writing. Maybe a writer, a newspaper reporter, or a lawyer will be your favorite job. If you like learning
facts about science, becoming a scientist, a biologist, or an astronomer(天文学家) may be your best
choice. If you like doing creative(创造性的) work, maybe you should think about becoming an artist, a
photographer(摄影师), or a musician(音乐家).
( )1. A writer          
( )2. An artist          
( )3. A lawyer          
( )4. A biologist        
( )5. A scientist        
( )6. A news reporter    
( )7. An astronomer      
( )8. A photographer    
( )9. A musician         
                             		A. produces paintings or drawings.                                  
B. studies animals and plants.                                      
C. writes books and stories.                                        
D. studies and practices law.                                      
E. takes photos as a professional.                                  
F. studies space and stars.                                        
G. works in science, does scientific research.                      
H. makes music and plays a musical instrument very well.            
I. writes about news events for a newspaper, or tells people        
about them on TV or on the radio.                                   
                                                                    
查看答案
单项选择题

EDTA滴定法的标准曲线准备工作有：

①建立水泥剂量与EDTA二钠消耗量之间的关系曲线；

②对其它几种试样，用同法进行滴定；

③取样，并测试其含水量；

④吸取悬浊液，加入氢氧化钠和钙红指示剂；

⑤准备5种试样，水泥含量从0～8％递增；

⑥用EDTA二钠标准液滴定至纯蓝色，记录EDTA二钠的消耗量；

⑦试样中加入氯化铵溶剂搅拌后放置沉淀；

⑧计算混合料的组成；

正确准备顺序为（）。

A.③④⑦⑧⑥⑤②①

B.④⑦②⑧③⑥⑤①

C.⑤⑧③④⑥②①⑦

D.③⑧⑤⑦④⑥②①
查看答案