选择计算 ( − 4 x y 2 + 3 x 2 y ) ( 4 x y 2 + 3 x 2 y ) 的最佳方法是 ( )
A.运用多项式乘多项式法则B.运用平方差公式
C.运用单项式乘多项式法则D.运用完全平方公式
﹣﹣﹣The dining hall is specially built for .
﹣﹣﹣That's great! People over seventies won't have to worry about their daily meals.( )
an old man
the old man
the old
If you are friendly to others, you______make more friends.( )
would
could
will
﹣﹣﹣I don' t know______we will go.
﹣﹣﹣Why not? We will go to the beach for a picnic.( )
Where
When
how
﹣﹣﹣What do you usually do before going to bed?
﹣﹣﹣I______.( )
used to write diaries
am used to sleeping
am used to reading
The environment will be much worse______everyone has a sense of protecting it.( )
unless
if
so that