0℃以上的低温对作物造成的伤害叫（），0℃以下的低温对作物造成的伤害叫（）。
参考答案：冷害；冻害
读一读，判断正误。
( )1. The cat is in the box.
( )2. The cat is under the table.
( )3. The T-shirt is big.
( )4. The boy is short.
( )5. I have twenty books.
Why ____________ enjoy Beijing opera with us?
A．not to
B．don’t
C．not
D．you don’t
The cat is in the box. 
The cat is under the table. 
The T-shirt is big.
The boy is short.
I have twenty books.