项目级安全教育由( )组织实施，专职或兼职安全员协助。 A．班组长 B．项目级负

John was a bookseller. He didn’t like paying for anything. One day he let a big box of books fall on his foot. “Go to the doctor,” said his wife. “No,” he said, “I’ll wait until the doctor comes into the shop next time. Then I’ll ask about my foot. If I go to see him, I’ll have to pay him.”

The next day the doctor came into the shop and bought some books. When John was getting them ready, he told the doctor about his bad foot . The doctor looked at it. “Yes,” said the doctor, “you must put that foot in hot water every night.” “Thank you,” said the bookseller, “and now sir, here are your books.” “How much?” said the doctor. “Two pounds,” answered John. “Good,” said the doctor. “I shall not have to pay you anything.” “Why?” asked John in surprise. “I told you about your foot . I want two pounds for that . Good-bye.”

(   ) 1. What was John? He was ______.

A. a doctor        B. a shop assistant        C. a bookseller        D. a farmer

(   ) 2. John hurt his foot because ______.

A. he didn’t like paying anything               B. a big box of books fell on his foot

C. he wanted to ask the doctor about his foot      D. a box of food fell on his foot

(   ) 3. ______ told him to go to the doctor.

A. His wife        B. A man              C. Nobody         D. His friend

(   ) 4. When the doctor came the next day, he ______.

A. bought nothing                   B. didn’t give John any advice on his foot  

C. bought some books                 D. told John to go to hospital

(   ) 5. At last the doctor paid ______ for his books.

A. two pounds      B. nothing     C. less than two pounds     D. a little money

熟料外放输送皮带那条不属于熟料工段（）

A、24#皮带

B、25#皮带

C、26#皮带

D、27#皮带

2012年9月25日我国第一艘航空母舰“        ”按计划完成建造和试验试航工作，正式交付海军。（       ）

A．大连舰

B．青岛舰

C．威海舰

D．辽宁舰

实验测定酸碱中和滴定曲线是高中化学的重要定量实验。下表是用0.10 mol/L的盐酸滴定 0.10 mol/L 20.00 mL NaOH 溶液时获得的一些相关数据。请回答下列问题：

（1）填写表中①②对应的 pH （结果保留两位小数）

（2）下图是本实验的滴定曲线图。请根据该图，说明强酸溶液滴定强碱溶液时，为什么既可以使用甲基橙作为指示剂，又可以使用酚酞试液作指示剂来指示滴定终点？

（3）若在滴定终点时俯视读数，最终测得的氢氧化钠溶液的浓度会        （填“偏大”、“偏小”或“没有影响”，下同）；若滴定结束时，滴定管尖嘴悬有半滴标准盐酸，最终测得的氢氧化钠溶液的浓度会；若盛装待测液的锥形瓶洗涤干净后，未干燥即盛装待测液，最终测得的氢氧化钠溶液的浓度会           。

慢性肺源性心脏病急性发作期应首选的治疗方法是

A．抗结核
B．止咳化痰
C．消炎平喘
D．糖皮质激素
E．吸氧