单项选择题

A．It helps to keep the eyes moist.
B．It helps the eyes absorb eye-drops.
C．It improves a person’s concentration.
D．It prevents a buildup of chemicals in the eyes.
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单项选择题
A．Whether it is necessary to put labels on prepared foods.B．What the daily requirements for certain nutrients should be.C．How to get consumers to read labels more carefully.D．What information food manufactures should provide to consumers.
A．Whether it is necessary to put labels on prepared foods.
B．What the daily requirements for certain nutrients should be.
C．How to get consumers to read labels more carefully.
D．What information food manufactures should provide to consumers.
单项选择题
A．It means that one always knows what his muscles are doing.B．It means that one performs simple actions without working.C．It means that one’s muscles are used only to the extent necessary for each action they perform.D．It means that one improves muscular action consciously.
A．It means that one always knows what his muscles are doing.
B．It means that one performs simple actions without working.
C．It means that one’s muscles are used only to the extent necessary for each action they perform.
D．It means that one improves muscular action consciously.
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