如图所示，粗糙的传送带与水平方向夹角为θ，当传送带静止时，在传送带上端轻放一小物块，物块下滑到底端时间为T，则下列说法正确的是（   ）

    We usually have three meals a day, breakfast, lunch and supper. Which meal will

    c____ us the fewest health problems if we have to miss one ? Most people would rather not have breakfast, especially teenagers. They just eat some snacks or fast food i____. What will happen if we do like this?

    Many scientists and doctors in the field of health consider breakfast to be the m____ important meal of the day. If we eat a good breakfast, they say, we will have e____ energy we need to begin our working day. They remind us that our bodies burn the energy from food within four hours. A____ we may use up less energy while we sleep, it's a long time until morning and we still wake up with the need for a lot more fuel.

    One recent study c____ out in the USA tested a large number of people from 12 to 83 years old. These people were given different kinds of breakfasts, and sometimes, some of them didn't eat breakfast completely. The r____ showed that if a person eats an adequate (充足的) breakfast, he or she will work more actively than that who eats a very poor breakfast or doesn't eat breakfast. It also showed that children don't do well if they go to school w____ eating breakfast. They can't focus on their lessons for a long p____ of time when their stomachs are making some noise. In addition, the study suggested that avoiding breakfast may i____ the chance of a heart attack.

    To sum up, none of the three meals can be missed. We should find time to make proper meals and then enjoy them.

纪昌学射<节选>

    纪昌对自己的成绩感到很满意，以为学得差不多了，就再次去拜见飞卫。飞卫对他说：“虽然你已经取得了不小的成绩，但你的眼力还不够。等到练得能够把极小的东西，看成一件很大东西的时候，你再来见我吧！”纪昌记住了飞卫的话，回到家里，又开始练习起来。他用一根长头发，绑住一只虱子，把它吊在窗口，然后每天站在虱子旁边，聚精会神地盯着它。那只小虱子，在纪昌的眼里一天天大起来，练到后来，大得竟然像车轮一样。