更多"Calcium -rich food______its supplem"的相关试题:
[填空题]Calcium - rich food ______ its supplements because it also provides other nutrients like vitamin D and other minerals.
[填空题]Calcium -rich food______its supplements because it also provides other nutrients like vitamin D and other minerals.
[单项选择]
Although spinach is rich in calcium, it also contains large amounts of oxalic acid, a substance that greatly impedes calcium absorption by the body. Therefore, other calcium-containing foods must be eaten either instead of or in addition to spinach if a person is to be sure of getting enough calcium. Which of the following, if true, most seriously weakens the argument above（）
A. Rice, which does not contain calcium, counteracts the effects of oxalic acid on calcium absorption
B. Dairy products, which contain even more calcium than spinach does, are often eaten by people who eat spinach on a regular basis
C. Neither the calcium nor the oxalic acid in spinach is destroyed when spinach is cooked
D. Many leafy green vegetables other than spinach that are rich in calcium also contain high concentrations of oxalic acid
E. Oxalic acid has little effect on the body’s ability to absorb nutrients other than calcium
[填空题]
- A. as fish does
- B. because of its rich natural resources
- C. by the United States in the 19th century
- D. shines day and night
- E. only a very small percentage
- F. a limited amount of the gold found there
For as long as three months of a year, the sun ______ on the ice-covered land of Alaska.
[单项选择]A. Because mountainous regions have a very rich biology.
B. Because they can move uphill to get cooler.
C. Because there are no deserts in mountainous regions.
D. Because they need a warmer environment to survive.
[填空题]Athletes should avoid certain kinds of supplements, for they may cause side effects which will do harm to the athletes.
[填空题]Researchers say that supplements can completely take the place of real food in the near future.
[判断题]It is advised that fiber supplements and medicine be taken at the same time.
[单项选择]The Now Rich and the Old Rich
Though it is mere 1 to 3 percent of the population, the upper class possesses at least 25 percent of the nation’s wealth. This class has two segments: upper-upper and lower-upper. Basically, the upper-upper class is the “old rich”—families that have been wealthy for several generations and aristocracy of birth and wealth. Their names are in the Social Register, a listing of acceptable members of high society. A few are known across the nation, such as the Rockfellers, Roosevelts, and Vanderbilts. Most are not visible to the general public. They live in grand seclusion (深居简出), drawing their income from the investment of their inherited wealth. In contrast, the lower upper class is the “new rich”. Although they may he wealthier than some of the old rich, the new rich have hustled(急于做)to make their money like everybody else beneath their class. Thus their prestige is generally lower than that of the old rich, who have not found it necessary to lif
A. the upper-upper class is of aristocratic origin
B. the “old rich” enjoy higher prestige than the “new rich”
C. the “old rich” isolate themselves and lead a lonely life
D. the upper class owns at least a quarter of the country’s wealth
