____________is a play based on the Germanlegend of a magician aspiring for knowledge and finally meeting his tragic end as a result of selling his soul to the Devil.
A.Tamburlaine
B.hero and Leander
C.Dr. Faustus
D.Amores
A.Tamburlaine
B.hero and Leander
C.Dr. Faustus
D.Amores
A、fork
B、knife
C、spoon
D、chopstick
Passage 5 Each time a person opens his or her mouth to eat, he or she makes a nutritional decision. These selections make a definitive difference in how an individual looks, feels, and performs at work or play.When a good assortment of food like fresh fruits, leafy vegetables, whole grains and lean proteins is selected and eaten, the consequences are likely to be desirable levels for health and energy to allow one to be as active as needed. Conversely, when choices consist of processed foods like packaged cookies, crackers, and sodas, items filled with sugars, hydrogenated fats, chemicals and preservatives – all of which can be harmful in large quantities – the consequences can be poor health or limited energy or both. Studies of American diets, particularly the diets of the very young, reveal unsatisfactory dietary habits as evidenced by the numbers of overweight and out-of-shape young children. Parents, who are supposed to be masters of their children’s dietary habits, often leave nutritional choices to their children, who are not informed enough to make healthy decisions. If anyone is to blame for the childhood obesity crisis in the United States today, it is the parents who allow their children to eat nutritionally bankrupt foods. The author most likely uses the phrase “filled with sugars, hydrogenated fats, chemicals and preservatives – all of which can be harmful in large quantities”in order to:
A、criticize the growing obesity crisis in the United States.
B、contrast poor choices in children in the United States with healthy choices.
C、identify the leading chemicals in processed foods so people know what to avoid.
D、intensify the negative reaction to processed foods.
下列说法正确的个数有( ) (1)立方根是它本身的数是0和1 (2)没有平方根的数也没有立方根 (3)异号两数相加,结果为负数 (4)数轴上的点与有理数一一对应 (5)a为有理数,则|a|≥-a (6)定义新运算*为a*b=a2+b-2,则(-1)*3*2=0 (7)8.57万精确到十分位 (8)若a,b互为相反数,则
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B.结构性成本动因先于执行性成本动因而出现
C.执行性成本动因常常直接影响企业的大部分约束性固定成本
D.结构性成本动因的程度不是越高越好
用平行截面面积已知的立体体积公式计算下列各题中立体的体积.
(1)以半径为R的圆为底,平行且等于底圆直径的线段为顶,高为H的正劈锥体.
(2)半径为R的球体中高为H(H<R)的球缺.
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