若全集U=R，集合M={x|x（x﹣2）≤0}，N={1，2，3，4}，则N∩∁_UM=____ 

完成反射的结构基础是反射弧，以下完成反射正确的顺序是（ ）

①____桃花    杜鹃花    梅花    月季

②____荷花    菊花    牡丹    向日葵

③____桂花    牵牛花    芙蓉    百合

④____腊梅    水仙    杜鹃    马蹄莲

    Mr. and Mrs. Su don't often go out in the evening, but today they go out for a walk after supper. They go to the park and have a good time there. On their way home, Mr. Su says to Mr. Su, "Look! A woman is running in the street and a man is running after her." Mr. Su says, "What's the matter? Let's go and help her."

    Now the woman gets near them. Mr. Su asks, "Shall we help you?" "No, thank you," the woman says, "My husband（丈夫） and I are running home, and the slower (较慢的) one does the housework."