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计算：货车103型制动机，当列车管减压120KPa时，空车位和重车位的制动缸压力各是多少？

答案

参考答案：

重车位PZ=2.6r-10=2.6×120-10=302KPa

空车位Pk＝0.54PZ=0.54×302=163KPa

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选择合适的建议填在括号内。
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            How can I stop worrying about what they think?
(     )2. My dream is to be on the Olympic team for swimming. My dad thinks
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(     )3. What should I do if I failed a test? I'm afraid to tell my mom because
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( )4. I just came to a new school and I'm kind of shy, so how do I make new friends?
(     )5. I am good at all subjects except English. I can't remember words well.
           And I am weak in speaking and listening. What shall I do?

A. When you failed a test, it's better to tell your mom the truth than
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    And you can make a vocabulary list, too.
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F. Reading books might be a good idea. You can learn a lot from reading books.
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单项选择题

软性下疳的病原菌是

A．杜克嗜血杆菌

B．埃及嗜血杆菌

C．副嗜沫嗜血杆菌

D．副流感嗜血杆菌

E．嗜沫嗜血杆菌
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