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【单选题】
生产石膏的主要原料是( )A.
CaCO3
B.
Ca（OH）2
C.
CaSO4.2H2O
D.
CaSO4.1/2H2O
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皮皮学刷刷变学霸
举一反三
【单选题】Three pencils cost the same as two erasers. Four erasers cost the same as one ruler. Therefore, pencils are more expensive than rulers
A.
Ture
B.
False
C.
Uncertain
【单选题】Three pencils cost the same as two erasers. Four erasers cost the same as one ruler. Therefore, pencils are more expensive than rulers.
A.
True
B.
False
C.
Uncertain
【简答题】心理过程可分为认识过程、情绪和情感过程及___________过程,三者之间既有区别又相互联系。
【简答题】Three pencils cost the same as two erasers. Four erasers cost the same as one ruler. Therefore, pencils are more expensive than rulers.
【判断题】Three pencils cost the same as two erasers. Four erasers cost the same as one ruler. Therefore, pencils are more expensive than rulers .
A.
正确
B.
错误
【单选题】Three pencils cost the same as two erasers. Four erasers cost the same as one ruler. Therefore, pencils are more expensive than rulers.
A.
true
B.
false
C.
uncertain
D.
...
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