2.Why does Prof. White not allow her to do so?
A. Because everybody is clear about what to do.
Because she should have the computer fixed.
C. Because every student must submit their papers before the deadline.
查看答案
3.Why is Li Ting unable to finish her term paper on time?
A. Because her computer broke down.
Because she has been sick since last week.
C. Because she hasn’t finished reading the book.
4.What is Li Ting going to do?
A. Return the book to Prof. White.
B. Get David to fix her computer.
C. Access her term paper from the computer.
5.What is the last request Li Ting makes?
A. Finishing reading the book.
B. Submitting her term paper.
C. Keeping the book for another week.
以下试剂能作为基准物质的是( )
A. 优级纯的NaOH
B. 化学纯的Co2O3
C. 100℃干燥过的CaO
D. 99.99%纯锌
微信支付 
支付宝支付