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【单选题】
如果-14a是一个负数，那么（ ）A.
a＞0
B.
a＜0
C.
a≥0
D.
a≤0
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【单选题】下列关于SQLiteDatabase说法中不正确的是()。
A.
SQLiteOpenHelper对象调用getReadableDatabase()或者getWritableDatabase()方法可以生成SQLiteDatabase对象
B.
与其他关系型数据库相似,SQLiteDatabase也可以实现数据的增、删、改、查操作
C.
SQLiteDatabase对象无法执行原生SQL语句
D.
SQLiteDatabase在使用后需调用close方法关闭数据库
【单选题】Our memories are like jello in that
A.
they are both soft
B.
both can be shaped and reshaped easily
C.
they both take time to solidify
D.
both are susceptible to damage
【单选题】Scientists have long believed that constructing memories is like playing with neurological toys. Exposed to a barrage of sensations from the outside world, we connect together brain cells to form. new...
A.
The neurons used to build the memory are a depletable resource.
B.
The reason of memory loss as one grows older is that the neurons are worn out with the increase of age.
C.
New memories do not need the supply of new neurons in the brain.
D.
All of above.
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