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【单选题】
使用SQLiteOpenHelper的构造方法创建与数据库连接时，参数可以设置为null的是A.
上下文
B.
数据库名
C.
游标工厂
D.
数据库版本
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举一反三
【单选题】Great changes _____ in our country since twenty years ago. [ ]
A.
have taken place
B.
have been taken place
C.
took place
【单选题】Great changes _____ in my hometown since 1980. [ ]
A.
have been taken place
B.
took place
C.
have taken place
D.
were taken place
【单选题】—How do you like China? —Great changes _______ since I _______ here 8 years ago.
A.
have taken place; came
B.
took place; have come
C.
took place; came
【单选题】Great changes ______ in China since1978.
A.
have been taken place
B.
had taken place
C.
have taken place
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