王叔叔带了900元买木材，买了28根木材，剩下4元．每根木材多少元？
（900-4）÷28
=896÷28
=32（元）；
答：每根木材32元．
─This box is _____ heavy for me to carry. Can you help me?
─Certainly. [ ]
A. so
B. much
C. very
D. too
下列事例能减小压强的是 [ ]
A.
B.
C.
D.
