CoⅡes骨折，最有诊断意义的体征
A．局部肿胀B．典型畸形C．局部压痛D．反常活动E．手功能受限
参考答案：B
根据句义及首字母提示完成单词：
1. Have you ever been to an a _____ park?
2. —I have never been to the space museum.
— N _____ have I.
3. I want to u _____ English language movies.
4. Why do you want to I _____ your English?
5. I started to t _____ lessons in a language school.
设某种商品每天的需求量为100个，每次发出订单的固定订货费为100元，每单位商品每天的储存费为0.02元。如果不允许缺货，并且发出订单即能收到货物，经济批量为 ______单位。
A．2 000
B．1 000
C．800
D．1 200
