物体做自由落体运动，下落1s的位移是____ m，速度是____ m/s．

    在中国，文学的源头究竟是神话，还是六经呢？刘毓庆认为中国文学的源头是六经。他的理由有如下几个方面：

    中国古代没有神话概念，这就意味着神话未能作为一个独立的文化形态而存在。所谓的上古神话，其实是对上古史的一种记述方式。徐旭生先生《中国古史的传说时代》说：“很古时代的传说总有它历史方面的质素、核心，并不是向壁虚造的。”当下文学史著作中所讲述的上古神话，如后羿射日、女娲补天、盘古开天、共工触山等，并不是产生在上古，而是战国以后，真正属于上古的神话很有限。像精卫填海、夸父追日、黄帝战蚩尤等，这属于上古神话，而这些神话都有历史作内核，其实是上古史的神话化。

    即使神话存在，也构不成文学之源的功能。所谓“源”，一定要形成对“流”的规定性作用才行。即所谓“本立而道生，源治而流清”，它要决定其“流”之巨细清浊。只有有了“流”，“源”的意义才能成立。尽管中国上古产生过神话，但这些神话对中国文学并没有规定性，形不成“源”的功能。无论怎样抬高它，它也无法取得像希腊神话在欧洲文学史上那样的地位，它对中国文学发展的影响并不像研究者所说的那般巨大。我们可以做这样的设问和思考：假如没有上古神话，中国文学是否会逊色？中国文学史是否会改变它的形态与发展方向？中国文学史上的一个个巨星如“李杜”“苏黄”“唐宋八大家”是否会出现？我想结论是很清楚的。

    假如没有西方学者神话研究的理论与观念的输入，恐怕至今人们也不会意识到有神话的存在。也就是说，没有神话，中国文学史不会重写；而没有六经，中国文学史则必须重写。因而把神话定位为中国文学之根，是不能成立的：将神话作为中国文学之源，是用西方概念规范中国学术的结果。

（摘编自《中国文学的源头是什么》，有删改）

    Controlling your food longings and dropping pounds fast is easy: Just eat breakfast. The editors of Eat This, Not That! carried out researches to determine some best breakfast food for weight loss.

Black Beans

    Protein, per 1/2 cup: 7g

    Black beans will not only fill you up for hours but also help slim you down. Wake Forest Baptist Medical Center researchers found that with black beans consumed daily, study participants' fat reduced by 4 percent over two years.

Peanut Butter

    Protein, per 2 tbsp: 7—8g

    While processed peanut butter is filled with sugar and oils, the real stuff is made with just two ingredients: salt and peanuts. The peanut is filled with heart-healthy monounsaturated fats. Nutritionist and personal trainer Kristin Reisinger suggests using the healthy fat in an AM smoothie.
Almond Butter

    Protein, per 2 tbsp: 7—8g

    “Almond butter is high in protein, fiber and monounsaturated fats,” says Martha McKittrick, RDN, CDE. “Studies have also shown that people who eat nuts are less likely to become overweight than those who avoid them, likely because it helps you feel fuller.” To get the benefits at breakfast, McKittrick suggests spreading some nut butter on the whole grain toast.

Eggs

    Protein, per two large eggs: 13g

    “Eggs are an excellent source of protein and other healthy nutrients including fat-burning choline(胆碱),” says McKittrick. Choline, also found in lean meats, seafood and collard greens, attacks the gene mechanism that causes your body to store fat around your liver, according to Zero Belly Cookbook. The more eggs you eat, the less egg-shaped you get.