A:0
B:1
C:2
D:3
求涂色部分的面积.
面积是____ dm2
写出下列词语中的错别字,并在括号里改正过来。
游手好娴____ 天崖海角____ 鱼贯尔人____ 落谎而逃____
与世融绝____ 文所未闻____ 用之不歇____ 郑重其是____
根据句意及首字母提示完成单词 Do you like eating ice cream in s ____?M ____ is not everything, but we must have it. Don't run when you see a dog. It is d____. Miss Smith is a good teacher, and she t____ us English.As a reporter, he works for a m____.
设常数a∈R,集合A={x|(x﹣1)(x﹣a)≥0},B={x|x≥a﹣1},若A∪B=R,则a的取值范围为( )