73比64多____，28比53少____。

榆林国家级能源化工基地，是全国唯一的国家级能源化工基地——陕北能源化工基地的一部分。榆林市能源基地的建设中可能面临的向题是（    ）

近年来，玩微信成为一种生活新常态，成为了人们常用的通信方式，也被很多青少年认为是“交友利器”；但是，一些不法分子利用微信造谣传谣等实施违法犯罪行为，微信成为了“危信”。为此，我们青少年应该（    ）

①树立安全意识、自我保护意识                       ②远离微信，倡导健康文明的生活方式

③时刻牢记微信交往的道德和法律规则           ④要学法、知法、守法，善于用法律武器维护自己的利益

图示为小刚所连的两盏白炽灯和两个插座的电路图，通电后发现不能正常工作。下面几个措施中可能引起危险的是（   ）

    A group of graduates got together to visit their old university professor.

    The conversation soon turned into complaints about 1 in work and life. To offer his 2 coffee, the professor went to the kitchen and 3 with a large pot of coffee and a 4 of cups---plastic, glass, metal, porcelain (陶瓷), crystal, some plain-looking, some beautiful. The professor told his students to 5themselves to hot coffee.

    When all the students had a cup of coffee in hand, the professor said, “lf you have 6, all the nice-looking expensive cups have been 7, leaving behind the plain and 8 ones. While it is normal for you to want only the best for yourselves, that is the 9 of your problems and stress.”

    The professor continued, “Believe that the cup itself adds no 10 to the coffee. In most cases it is just more expensive and in some cases it even 11 what we drink. What all of you 12 wanted was coffee, not the cup, but you consciously went 13 the best cups.”

    Now 14 this: life is the coffee; the jobs, money, and 15 in society are the cups. 16 are just tools to hold and contain life, and the different types of cups we have don't decide, nor 17 the quality of life. If we concentrate only on the cups, we will 18 to enjoy the coffee in it. So don't let the cups 19you...enjoy the coffee instead.

    At these words, the graduates looked at each other in 20 embarrassment.