A:次氯化钙溶液
B:碳酸氢钙溶液
C:石灰水
D:硅酸钠溶液
若M=(2015﹣1985)2,O=(2015﹣1985)×(2014﹣1986),N=(2014﹣1986)2,则M+N﹣2O的值为____ .
⑴____ A.photo B. box C. clock D. lost
⑵____ A. thank B. think C. thing D. brother
⑶____ A. brown B. know C. now D. how
⑷____ A. food B. good C. school D. room
⑸____ A. blue B. bus C. lunch D. number