— These problems are too hard to . Will you give me some advice? — There are many ways. The most important is to have a careful plan.
A:hand out
B:work out
C:look out
D:break out
计算(﹣2)×3所得结果正确的是( )
Those are the facts ____ ____ every schoolboy is familiar.
读“某地等高线地形图”,下列判断正确的是( )