阅读理解，判断对"√"错"×"。

Dear Tom,

    Today I had two hamburgers for lunch. I like hamburgers very much. I wanted to have another one, but

Mum didn t want me to eat too much. She doesn t like hamburgers. She drank some juice. Tomorrow is

Dad's birthday. Mum is going to make a cake for him. I'm going to eat lots of delicious food. I wish Dad a

happy birthday!

                                                                                                                                      Yours,

                                                                                                                                         Sam

( ) 1. Sam ate two hamburgers today.

( ) 2. Sam's mum likes hamburgers very much.

( ) 3. Sam's mum drank some juice for lunch.

( ) 4. Sam's mum is going to make a cake for Sam.

凡由非生物因子引起的植物病害都是没有传染性，没有侵染过程，称为（）或（），也称生理性病害。