银行承兑汇票出票人可以是承兑银行的开户单位，也可不是。

《特种设备安全监察条例》规定，特种设备使用单位有哪几种情形之一的，由特种设备安全监督管理部门责令限期改正；逾期未改正的，处２０００元以上２万元以下罚款；情节严重的，责令停止使用或者停产停业整顿？

某行政机关将办公大楼的建设工程发包给某建筑公司承建，行政机关与建筑公司建立的是( )。

A．行政法律关系

B．民事法律关系

C．管理法律关系

D．经济法律关系

Directions: Read the following passage. Answer the questions according to the information given in the passage and the required words limit. Write your answers on your answer sheet.

Several years ago, Masaru Ibuka, the chairman of Sony, was at a company planning a meeting. Suddenly he had a brilliant idea. He stopped the meeting and asked everyone present what would happen if Sony removed the recording function and speaker and sold headphones with a tape player instead. Almost everyone thought he was crazy. Still, Ibuka kept thinking about his idea and worked at refining it. The result, of course, turned out to be the wildly successful Sony Walkman.

Good ideas often start with a really silly question. Bill Bowerman was making breakfast one day. As he stood there making waffles(蛋奶烙饼)for his son, he wondered what would happen if he poured rubber into his waffle iron(蛋奶烙饼烤模).So, he tried and the result looked something like the bottom of most sports shoes we see today. Still,when he took this idea to several existing shoe companies he was literally(确实地)laughed at. In fact, every single company turned him down. Though rather disappointed. Bowerman was determined and went on to form his own company, making NIKE athletic shoes.

Sometimes good ideas grow out of frustration. When Fred Smith was a student at Yale University, he had some paperwork that he needed to have delivered across the country the next day. Smith was amazed to find out that overnight delivery was impossible. He sat for a long while wondering why. Why couldn’t there be reliable overnight mail delivery service? He decided to design one. Smith did just that and turned his design into a class project. His business professor gave him only a C for efforts. However, Smith refined the idea in that class project and eventually turned it into one of the first and most successful overnight mail services in the world——FedEx.

81. What did Masaru Ibuka’s idea turn out to be? （no more than 2 words）

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82. What did Fred Smith’s teacher think of his class project? （no more than 8 words）

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83. From what idea did Bill Bowerman make Nike athletic shoes ？（no more than 9 words）

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84. What is the main idea of the passage? （no more than 12 words）

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患儿，女性，6岁，第一恒磨牙已经完整萌出，窝沟较深，医生决定对该牙进行封闭。在清洁牙面，采用含磷酸的凝胶酸蚀后，至少需要用水枪加压冲洗牙面多长时间（）

A.5秒内即可

B.5～10秒

C.10～15秒

D.20～30秒

E.40～60秒

白芷的功效有（）

A.散风解表

B.燥湿止带

C.温肺止咳

D.消肿排脓

E.通窍止痛