某市为提倡节约用水，准备实行自来水“阶梯计费”方式，用户用水不超出基本用水量的部分享受基本价格，超出基本用水量的部分实行超价收费．为更好地决策，自来水公司的随机抽取了部分用户的用水量数据，并绘制了如图不完整的统计图（每组数据包括在右端点但不包括左端点），请你根据统计图解答下列问题：

cos20°cos40°﹣sin20°sin40°的值等于（   ）

完形填空

    Recently, I felt like I reached a very low point in life. My relationships weren't good, I wasn't enjoying my classes, and I felt like I had nothing to1.My life seemed to be full of endless homework, tests and loneliness. Nothing anyone said seemed2o me. I wasn't sure what to do about myself. All I wanted was to be happy again, but I didn't know who or what would3that.

    During these days, I had trouble sleeping. I had to take sleeping pills but still woke up in the midnight. I had no4but to tell my dad. He5the book The Secret. I immediately bought the e-book online and read the whole thing that night. I'm6quite a stubborn person, but the effect on my mood after finishing the book was7. Suddenly, I felt like life was beautiful again. I had never felt such a deep and quick8in my life before.

    In fact, the book's message was very simple—think positively(积极地).The book had many success stories about how people were able to9money, soul mates(心灵伙伴)and old friends back into their lives. I started learning to thank everything in my life like them. Little by little, I realized that The Secret could only work10I believed these people's success stories.

    Now I'm sure I can bring myself happiness.

在正方体ABCD–A₁B₁C₁D₁中,M,N分别为棱AA₁和B₁B的中点,若θ为直线CM与所成的角,则="    "                                                                                               （   ）                                                

不等式x+1≥2的解集在数轴上表示正确的是（   ）