【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】企业对外发生经营业务收取款项时,应( )开具发票。
【单选题】如图下列使用胶头滴管的方法中正确的是( )
【单选题】下列使用胶头滴管的方法正确的是
B.
向试管内滴加液体时,胶头滴管应伸入试管内,以免因手抖动而使药品撒出来
C.
向试管内滴加液体时,胶头滴管应在试管上方,竖直向下
【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】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
【单选题】导游员王某在旅游结束时,曾直接向旅游者索要小费,引起了投诉,应扣( )