From 1948 to 1966 average yearly growth in real spendable earnings was ______ percent in the United States.
A.1.1 B.2.1 C.3.1 D.4.1正确答案B
From 1948 to 1966 average yearly growth in real spendable earnings was ______ percent in the United States.
A.1.1 B.2.1 C.3.1 D.4.1正确答案B