已知集合M={x|x＜1}，N={x|2^x＞1}，则M∩N=（　　）

    A lot of people in our country take a nap after lunch, so do my classmates.____ (recent) I have conducted a survey on____ (take) a nap after lunch among my classmates. Most of them are in the habit of sleeping for____while at noon as they believe it does good to them. The majority prefer____do so around 12:30 and the nap usually lasts for about 30 minutes. They often ____ (choice) to sleep at home instead of in their classroom ____dormitory.

    Hopefully, the result of my survey can draw the attention of our parents and school. Since most students are in need of a nap, proper____ (arrange) should be made so that students can have a good rest after a whole ____ (morning) hard work. Students should not be____ (ask) to do extra work during this period of time. After all , having a nap after lunch, one can feel ____(refresh) and energetic enough to study more efficiently in the afternoon.

给出下列函数：①y=2x；②y=-2x+1；③y=$\frac{2}{x}$（x＞0）；④y=x²（x＜-1）．其中，y随x的增大而减小的函数是（　　）

①a﹣b+c=0；②b²＜4ac；③当a＜0时，抛物线与x轴必有一个交点在（1，0）的右侧；④抛物线的对称轴是直线x=﹣ $\frac{1}{4a}$ ．

其中正确的结论是____（只填序号）