搜题请搜索小程序“爱下问搜题”
问题 单项选择题

用钢直尺测量工件的直径时，应该将尺的端边紧贴住被测件的一边，并来回摆动另一端，所获得的（）才是被测件的实际尺寸。

A.值

B.最大值

C.中间值

D.最小值

答案

参考答案：B

单项选择题

Dale Peterson plans to lease a computer from Gray Computing Services. It will be a 10-year lease with annual payments of $ 2400 plus a guarantee of a residual value of $ 4000 at the end of the lease. The asset has a 12 year useful life. The present value of the lease discounted at the appropriate interest rate of 9 percent is $ 17000. The company uses the straight-line depreciation method. In the first year, the reported lease expense is:（）

A. $3230.

B. $1530.

C. $2830.
查看答案
单项选择题

如果需要酸化保存待测目标是溶解态物质的水样，则应在加保存剂前先（）

A、调节pH值

B、降温

C、加入抗坏血酸

D、过滤
查看答案