生产环境中，物体温度达( )以上辐射的电磁波谱巾即可f|现紫外线。 A．600℃

阅读理解。

     A mother and her young son got into a bus in a small city and sat down. The bus conductor came to

them for their money. The mother said,  "I want one ticket to Oxford,"  and gave her a shilling(先令).

     The conductor looked at the small boy for a few seconds and then said to him,  "How old are you,

young man?"

     The mother began speaking, but the conductor stopped her, and the boy said, "I'm four years old at

home, and two and a half in buses and trains."

     The mother took six pence(便士)out of her bag and gave the money to the conductor. The conductor

gave her one and a half tickets.

1. One day the mother took a bus             .

A. to a small city    

B. to get some money    

C. with her son                  

2. The mother gave the conductor         pence in all(总共)that day.

A. 12          

B. 16          

C. 18

3. The mother was              .

A. honest      

B. not honest (诚实)      

C. very clever  

4. The conductor asked              how old he was.

A. the little boy    

B. the mother    

C. the bus driver

5. The boy was               years old then.

A. two        

B. four          

C. two and a half

Jack described his father, who  ____a   brave boy many years ago, as a strong-willed man.     [ ]

A. would be                    

B. would have been      

C. must be                    

D. must have been

GBS典型的脑脊液改变是蛋白质含量增高，而细胞数正常，称为________分离现象，为本病特点之一。蛋白质增高于起病后第________周最明显。

1935年9月，随红二十五军长征的中共鄂豫陕省委和中共西北工委在延川县永坪镇召开联席会议，宣布成立（）。

A.中国工农红军第十四军团

B.中国工农红军第十五军团

C.中国工农红军第十六军团

噪声强度在多少分贝以上，可造成高频率的听力损失（）。

A.60dB

B.80dB

C.100dB

D.110dB

E.120dB