初级飞机类别等级的商用驾驶员执照申请人必须至少有()小时作为驾驶员的飞行经历时间。
A.150
B.250
C.350
参考答案:A
阅读短文,回答问题。
Look! This is a picture of my family. My father's father is very old. He is seventy-six years old. He has
white hair. My grandmother is younger than my grandfather. She has gray hair and wears glasses. My father's
brother is older than my father. He wears glasses, too. Look at my cousin and me. I am taller than my cousin.
Can you guess which one is me?
1. My grandfather is than my grandmother.[ ]
A. older
B. younger
C. taller
2. My grandmother and my wear glasses.[ ]
A. brother
B. uncle
C. aunt
3. My cousin is than me.[ ]
B. taller
C. shorter
4. How many people in my family wear glasses?[ ]
A. One.
B. Two.
C. Three.
5. Is my grandfather's hair gray or white?[ ]
A. It's white.
B. No, it isn't.
C. It's gray.
生产硅酸盐水泥的主要原料是()原料,()原料和校正原料。