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【单选题】

What did President Jimmy Carter sign into law in 1978 ?

A.
The National Grandparents’Day.
B.
The National Grandchildren’s Day.
C.
The National Stepparents’Day.
D.
The National Stepchildren’s Day.
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参考答案:
参考解析:
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【单选题】What is the reason for setting an official holiday for stepparents?

A.
Because they love their role as stepparents.
B.
Because they are often treated as heroes in the family.
C.
Because they deserve respect and honor as family members.
D.
Because they are often seen as the most loving family members。

【单选题】( )

A.
ln| 2-x|+C
B.
-ln| 2-x|+C
C.
 
D.