题目内容

生物信息学的研究的终极目标是什么?what is the dead aim of bioinformatics?

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_____________ , that's conservatively the total hours our national team of craftsmen has worked safely each of the last three years.

A. Ten billion man-hours
B. Ten thousand man-hours
C. Ten million man-hours
D. Ten triillion man-hours

Our turbine techs worked on the mid-american wind farm in Adair Iowa tradesmen international.

A. 对
B. 错

Pipe welder and pipe fitter trades worked on the Ford electric car plant in Fremont California.

A. 对
B. 错

【单选题】PLC控制变频器的途径,下列叙述不恰当的是( )。

A. 利用PLC的模拟量输出模块控制变频器
B. PLC通过通信接口控制变频器
C. 利用PLC的开关量输入/输出模块控制变频器
D. PLC常通过因特网控制变频器

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