关于甲鱼的描述，正确的是（）
A.外地甲鱼身扁圆滑
B.甲鱼身色通常是黑色
C.雄甲鱼尾鲳鱼肉裙
D.腹部呈淡红色的为好
参考答案：C
Reading comprehension. 阅读理解。
Today is Thursday, December second. The weather is sunny. It is the second day of this month.
Yesterday was Wednesday December first. The weather was cloudy. Tomorrow is Friday.
1. How's the weather today?
2. What's the date today?
3. What day is tomorrow?
4. What day was yesterday?
催化蒸馏塔床层的催化剂包由（）组成。
A、不锈钢丝网
B、玻璃纤维袋
C、催化剂
D、不锈铁丝
