读一读，选出与画线部分不同类的单词。

1. Can I have some beef, please? [ ]

A. rice

B. vegetables

C. fork

2. I can use chopsticks.[ ]

A. knife

B. spoon

C. strong

3. Look, this is my uncle. [ ]

A. farmer

B. aunt

C. parents

4. My father is a doctor.[ ]

A. baby brother

B. nurse

C. baseball player

5. They're my grandpa and grandma.[ ]

A. father

B. teacher

C. mother

信号识别颗粒（signalrecognition particle，SRP）是一种

A.核糖核蛋白（ribonucleoprotein）

B.糖蛋白（glycoprotein）

C.脂蛋白（lipoprotein）

D.热休克蛋白（hsp）