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【简答题】
Section 4 This section is to test your ability to comprehend short passages. You will hear a recorded passage. After that you will hear five questions. Both the passage and questions will be read two times. When you hear a question, please complete the answer to it with a word or a short phrase (in no more than 3 words.)
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】下图为某型号泵在某管网中的运行工况图,在图中标注出稳定工况点、非稳定工况点,并说明为什么是稳定工况点或非稳定工况点。
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