【单选题】在撰写综述论文的过程中,阅读文献要达到的目的有()
C.
了解与该题目有关的一些材料,为撰写综述打下基础
D.
在阅读过程中,了解他人的写法,给自己写综述提供参考
【单选题】下列使用pH试纸的方法正确的是( )
D.
用胶头滴管滴1小滴待测液到pH试纸上测定溶液的pH
【简答题】如图所示:水以一定流速自下向上流动,在U形压差计中测得读数h=100mm,二测 压孔间距为1m,求: (1)流体由2-2截面流至1-1截面的能量损失hf为多少m水柱? (2)2-2与1-1截面间静压差ΔP为多少m水柱? (3)若流体作反向流动,则U形压差计读数h为多大?
【单选题】What is this news mainly about?
A.
The change in the policy of insurance.
B.
The independent insurance agency market.
C.
The development of an insurance company.
D.
The worries of an insurance customer.
【单选题】企业对外发生经营业务收取款项时,应( )开具发票。
【单选题】电力系统远动的“四遥”功能中的远程命令是指( )
【单选题】Zn的晶格常数为a,其原子半径为()a。
【单选题】What is this text mainly about?
A.
The life of people with I. Q. 's below 90.
B.
The life of people with the highest I. Q.
C.
The reason why people have different I. Q. levels.
D.
People with different I. Q. levels and the confliction among them.
【单选题】This passage is divided into three parts. Para 1 is Part I. What is the main idea for this part?
A.
the reason why the young man wanted to find a job
B.
the most important reason why he refused the job
C.
his disappointing experience to find the job