北京语言大学2021年9月《商务英语》作业考核试题及答案参考
1.A(n) _____ mouse emits and senses light to detect movement.
A.cordless
B.optical
C.camera
D.microphone
参考答案：B
2.Cash equivalents ( )
A.are illegal in some company
B.will be converted to cash within two years
C.will be converted to cash within 90 days
D.will be converted to cash within 120 days
参考答案：C
3.The units of production depreciation method matches expenses against revenue the best.( )
A.正确
B.错误
参考答案：A
4.From a very early age, perhaps the age of five or six, ...