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单项选择题

对呼吸道黏膜刺激最弱的中药是（  ） A.
桔梗 B.
远志 C.
紫菀 D.
甘草

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单项选择题
设备在投入使用前，应采用检定或校准等方式，以确保检验检测结果的计量溯源性，并标识其状态。属于自校准的设备是（ ）。
A.所有设备
B.强制设备
C.辅助设备
D.非强制设备
单项选择题
A young woman in a small German town was going to give a piano concert. Her posters said that he was a pupil of Franz Liszt, the great Hungarian pianist.
This was not true.
One day the woman learned that Liszt himself was in town. Now people would find out and she would never be able to give a concert again. What should she do? Finally she went to see the famous man herself. She told him everything. Her parents were dead and she was alone. She had to make a living. She decided to give piano lessons to rich children. But who would send their children to an unknown young woman? So she told people Franz Liszt was her teacher. .
"I believe you," Liszt said. "You've done wrong, but I can see you are truly sorry about it. That's enough. Now let me hear you play."
The young woman was shy at first. But then she saw Liszt smiling. It made her feel better. Now She wasn't afraid any more. She started playing. She put her heart into it and she played wonderfully. Liszt was quite pleased. When she finished, she turned to look at Liszt. There was a smile on his face. She could see he was pleased. Then Liszt gave her some advice. After he finished, "Now you really are my pupil. Go ahead with your concert. And you can add a note to the posters. Say that your teacher himself will be there. He will play the last piece."
What was the young woman?（　　
A.Shewasacollegestudent
B.Shewasanunknownpianist
C.Shewasanorphanwithalotofmoney
D.ShewasastudentofFranzLisztatfirst
单项选择题
分压是某组分在同一温度下单独占有混合气体的容积时所产生的压力。（请填写“正确”或“错误”）
A、正确
B、错误
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