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计算题：试计算某水样的含盐量、硬度值、碱度值。已知水样水质分析结果如下：Ca2+：30mg/L；Mg2+：6mg/L：Na+：23mg/L：Fe2+：27.9mg/L：HCO：122mg/L：SO：24mg/L：CL-：35.5mg/L；HSiO：38.5mg/L。
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【单选题】The pair of shoes he liked was ______.
A.
too expensive
B.
quite cheap
C.
not there
D.
not sold yet
【简答题】听下面一段材料，回答第1-3题。 1. What does the woman buy? A. A pair of shoes. B. A pair of jeans. C. A sweater. 2. What size does the woman wear? A. Small. B. Medium. C. Large. 3. What is the change? A. 50 dollars...
【单选题】The pair of shoes he liked was ______.
A.
too expensive
B.
quite cheap
C.
not there
D.
not sold yet
【简答题】有限状态机根据输出是否与输入有关,可以分为()和() 两种基本类型。
【简答题】听下面一段材料，回答第1至3题. 1. What does the woman buy? A. A pair of shoes. B. A pair of jeans. C. A sweater. 2. What size does the woman wear? A. Small. B. Medium. C. Large. 3. What is the change? A. 50 dollars...
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