(x+1)0+2(x-2)-2有意义,那么x的取值范围是______.
根据题意得,x+1≠0且x-2≠0,
解得x≠-1且x≠2.
故答案为:x≠-1且x≠2.
Who is that beautiful woman?
-- Mrs Li. She teaches _____ English very well. She always makes her classes______.
A.our;, interesting
B.us; boring
C.us; lively
D.our, surprising
麻黄的主要成分是
A.左旋伪麻黄碱
B.左旋麻黄碱
C.左旋甲基麻黄碱
D.右旋甲基伪麻黄碱
E.左旋去甲基麻黄碱