对某学生的膳食调查表明,全天总蛋白质的摄入量为80 g,其中来源于粮谷类的为42 g,动物性食物为30 g,豆类食物为6 g,其他食物来源为2 g,该学生膳食中优质蛋白质的比例是 ( )。 A. 47. 5% B. 52. 5% C. 45. 0% D. 60. 0%
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举一反三
【单选题】Which of the following is a behavioral mistake according to the western dining etiquette?
A.
After cutting the food, Americans would place the knife at the top of the plate, blade facing in and switch the fork to the right hand and eat with it.
B.
Right-handed, one takes the fork with the right hand, and the knife with the left.
C.
When leaving the table permanently, one puts his napkin to the left of the dinner plate.
D.
When having soup, one always uses a spoon to pick up the soup from near to far.
【单选题】Which of the following is a behavioral mistake according to the western dining etiquette?
A.
After cutting the food, Americans would place the knife at the top of the plate, blade facing in and switch the fork to the right hand and eat with it.
B.
Right-handed, one takes the fork with the right hand, and the knife with the left.
C.
When leaving the table permanently, one puts his napkin to the left of the dinner plate.
D.
When having soup, one always uses a spoon to pick up the soup from