已知人体的碳含量为18.25%，问体重为63 kg的人体相当于活度为多少贝可勒尔和多少微居里的放射源（）。

2024-01-12

A.265Bq，0.72μCi

B.2.65Bq，0.72μCi

C.26.5Bq，0.072μCi

D.2.65Bq，0.072μCi

参考答案：

2.65Bq，0.072μCi

When using a tool compensation function，you should check the direction and amount of compensation.。

类别: 题库 | 2024-01-12

Incorrect operation may lead to（）.

类别: 题库 | 2024-01-12

Before operation the machine， you should read the contents in the（）.

类别: 题库 | 2024-01-12

CNC diagnostic support at present includes four basic categories：start-up diagnostics，

类别: 题库 | 2024-01-12

Start-Up Diagnostics are a diagnostic routine that regularly operate automatically when the CNC is switched on.。

类别: 题库 | 2024-01-12

Off-Line Diagnostics are manual diagnostics which are intended for thorough；

类别: 题库 | 2024-01-12

Numerical control machine operators set up and tend（）.

类别: 题库 | 2024-01-12

With（）based CNC machine tool controllers， maintenance and repair are no longer an issue.pc

类别: 题库 | 2024-01-12

“Strut-machining department” means “柱式机床部门”.。

类别: 题库 | 2024-01-12

The CNC can‘t send messages to those users that its Windows account can access.。

类别: 题库 | 2024-01-12

加载更多~