在国产离心泵的型号表示法中，100D45×8表示( )。
A．泵的流量100m3/h，单级扬程45m水柱，8级分段多级离心水泵
B．泵的流量为45×8=360m3/h，扬程为100m的多级式离心水泵
C．泵的入口直径为100mm，单级扬程为45m水柱，8级分段式多级离心水泵
D．泵的入口直径为100mm，总扬程为45m水柱，8段多级离心水泵
参考答案：C
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school they ②____________ go home together. However, they have many ③____________ habits. For example on weekends, Anna likes to stay at home, watching TV or reading books, but Jenny often goes to the movies or goes ④____________ with her friends. Anna eats candy every day, ⑤____________ she knows it's not good for her health. Jenny likes to eat candy, ⑥____________. But she eats it only ⑦____________ a week. She thinks eating less candy can help her keep in good ⑧____________. It's Anna's birthday today. Anna thinks Jenny will buy a bag of candy for her. ⑨____________ in fact, Jenny buys her a book. It tells her how to form a healthy ⑩____________. |