生物反应器设计和操作的限制因素有那些？
参考答案：A：生物催化剂（酶、微生物）的浓度）和比活力。
B：反应器的传质和传热能力。
阅读短文，选择正确答案。
This is a picture of Mr. Brown's family. In the picture we can see Mr. Brown is sitting on a sofa. He is
reading the newspaper. Mrs. Brown is sitting near the computer. She is sending an e-mail to her mother. Mike
is 10 years old. He is a pupil. He is watching TV. Alice is 5 years old. She is playing with toys on the floor.
1. This is a picture of _____________.
A. Mr. Green's family
B. Mr. Brown's family
2. Where is Mr. Brown?
A. He is in the park.
B. He is sitting on a sofa.
3. What is Mr. Brown doing?
A. He is playing chess.
B. He is reading the newspaper.
4. Is Mrs. Brown sitting near the computer?
A. Yes, she is.
B. No, she isn't.
5. How old is Mike?
A. He is 9 years old.
B. He is 10 years old.
为了保证客户的库存商品完好无损，盘点作业是仓库储存作业的一个重要组成部分，根据盘点作业的内容，DT物流公司除查数量外，还要查( )。
A．安全
B．保管条件
C．质量
D．出库频率
