发电机空冷有几个？工作原理？
参考答案：
8个，工作原理：冷却水通过空冷管道，在管道外布置一层散热筒片，主要是为了增加散热交换面积，通过冷却水把热量带走。
连词成句。
1. am, I, at, school
________________________________________
2. are, Where, you
3. too, I, am
The nurse is providing home care to a client with failing vision due to macular degeneration. The nurse is concerned about the client's safety. Which of the following activities would help to lessen the client's risk of falling ？（）
A．Arranging pieces of furniture close together so the client can use them for guidance and support.
B．Encouraging the client to wear a medical identification bracelet that describes the client's visual deficit.
C．Installing a flashing light to indicate when the phone or doorbell is ringing.
D．Installing handrails in hallways, in bathrooms, and on steps.
