GIS气室密封情况下实施的局部性检修，如机构解体检查、维修、更换和试验，属于哪类检修？（）
A.A类
B.B类
C.C类
D.D类
参考答案：B
After dinner, Mother asked Tom __________ his home work. [ ]
A. to go on
B. to get down to do
C. to get down to doing
D. to getting down to doing
有颗粒性白细胞减少或缺乏症，血小板减少症是属于药物变态反应的
A．神经系统变化B．心血管系统反应C．血清病样反应D．血液病样反应E．肝炎样反应
