亚当·斯密明确指出，工资水平提高最快的地区是( )。
A．经济最发达的地区
B．经济增长速度最快的地区
C．最富裕的地区
D．最贫穷的地区
参考答案：B
The mother of a 9-month-old asks about adding new foods to his diet. The child is being breast-fed and takes formula and cereal when at the sitter’s. Which of the following would the nurse instruct the mother to do
A. Mix new foods with formula or breast milk.B. Mix new foods with more familiar foods.C. Offer new foods one at a time.D. Offer new foods after giving formula or breast milk.
压力表装用前不用校验（）。
A.对
B.错
