单项选择题

The following are external signs of vitamin deficiencies except ______.

A．dry skin
B．thinner and duller hair
C．cracks at the corner of the mouth
D．purplish tongue
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单项选择题
How many ways do nutritionists utilize to test malnutrition in general
A．7.
B．3.
C．5.
D．6.
单项选择题
A．roundB．containedC．storedD．burned
A．round
B．contained
C．stored
D．burned
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