问题
单项选择题
喷泉的水泵选择要求做到“双满足”，即（）。
A、流速满足、流速满足
B、流速满足、水压满足
C、功率满足、管径满足
D、流量满足、扬程满足
答案
参考答案：D
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喷泉的水泵选择要求做到“双满足”，即（）。
A、流速满足、流速满足
B、流速满足、水压满足
C、功率满足、管径满足
D、流量满足、扬程满足
参考答案：D
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| Mr Smith is 1 old man. Every 2 he goes for a walk in the park. And he 3 home 4 twelve thirty for his lunch in the middle of the day. But today a car stops 5 his house at l2 o'clock. Two policemen help 6 get out. One of them tells Mr Smith's daughter, "The old man 7 find his way home." The daughter thanks the policemen and they leave. Then she 8 her father, "Dad, you go to the park every day. But why you 9 find the way?" The old man smiles and says, "I find my way, but I don't want 10 home." | ||||
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