[单项选择]20号重柴油含义是（）
A. 凝点20℃
B. 闪点20℃
C. 运动粘度20°E
D. 露点20℃

Millions of Americans run to the bank or visit automated teller machines when they need cash. They use credit cards when they want to buy clothes, VCRs, or television sets.
But there is an underclass — people with low incomes and no credit history — who visit their neighborhood pawnshops when they need cash or a loan.
An estimated 20 percent of the US population has no bank account, more than half of this group don’t have credit cards and cannot get bank loans.
"These people are borrowing an average of $50," said John P. Caskey of Swarthmore College in Swarthmore, Pennsylvania. "If you add up in terms of how much dollar value pawnshops provide, they don’t look very important. If you add up how much of the population they serve or the number of loans they make, they are important."
Because they make loans, pawnshops are a type of bank, often calling themselves "the bank of the little people".
A. roughly 20 percent.
B. more than 10 percent.
C. less than 10 percent.
D. not mentioned in the passage.

In 1959 the (41) American family paid $ 989 (42) a year’ s supply of food. In 1972 the family paid $1 311. That was a price (43) of nearly one-third.
Every family has (44) this sort of experience. Everyone agrees that the cost of (45) a family has risen sharply. But there is less agreement (46) reasons for the rise are being discussed. Who is really (47)
Many blame the farmers who (48) the vegetables, fruit, meat, eggs and cheese (49) stores offer for (50) . According to the U.S. Department of (51) , the farmer’s share of the $ 1 311 spent by the family in 1972 was $ 521. This was thirty-one percent (52) than the farmer had received in 1959.
But farmers claim that this increase was very small (53) to the increase in their cost of (54) . Farmers tend to blame others for the sharp (55) in food prices. They particularly blame those who (56)
A. these
B. that
C. they
D. them