题干
读句子，把人物和动作图片搭配起来。
①Mary is going to read a book．____
②Bob is going to buy a pair of glasses．____
③The boys are making a poster．____
④The girls are going to act a play．____
A. 
B. 
C. 
D. 
答案(点此获取答案解析）
B,A,D,C
在区间
上是减函数，那么
有（ ）