【单选题】设f(x)在x 0 处存在左、右导数,则f(x)在点x 0 处()
【判断题】我国对供电可靠率的规定是99.6%。( )
【单选题】--- Jim _____at 9 pm. last night . --- I know .
【判断题】“晴柔”是指晴天的柔和风光;“惜”是“可惜”的意思。
【单选题】Look at the telephone message. It’s to from .
C.
Betty; Jim TELEPHONE MESSAGE From: Jim To: Betty Date: Nov. 1 Time: 9:00a.m. Message: Judy will have a talk about English writing at 3:00pm today. Be on time. Lucy
【判断题】颗粒物对重金属的吸附随着粒度的增大而减小。