硝普钠氰化物中毒()
A.低氧
B.高CO2
C.两者均有
D.两者均无
参考答案:A
--I will take an important test tomorrow.
--Oh, really? ________________!
A.Good luck
B.Congratulations
C.Well done
D.What a pity
堆垛机天轨的精度,其垂直方向直线度()
A.+-2MM
B.+-5MM
C.+-3MM