[单项选择]The incident that made the United States formally declare war against the Axis Powers was _______.
A. the Great Depression
B. the attack on the Soviet Union
C. the Japanese invasion of China
D. the bombing of Pearl Harbor in 1941

[单项选择]

The United States economy made progress in reducing unemployment and moderating inflation. On the international side, this year was much calmer than last. Nevertheless, continuing imbalances in the pattern of world trade contributed to intermittent strains in the foreign exchange markets. These strains intensified to crisis proportions, precipitating a further devaluation of the dollar.
The domestic economy expanded in a remarkably vigorous and steady fashion. The resurgence in consumer confidence was reflected in the higher proportion of incomes spent for goods and services and the marked increase in consumer willingness to take on installment debt. A parallel strengthening in business psychology was manifested in stepped-up rate of plant and equipment spending and a gradual pickup in outlays for inventory. Confidence in the economy was also reflected in the strength of the stock market and in the stability of the bond market. For the year as a whole, consumer and busine
A. United kingdom.
B. France.
C. Saudi Arabia.
D. Japan.

[单项选择]Formally, in the United States, many nurses worked as private duty nurses ______ in hospitals.
A. other than
B. more than
C. less than
D. rather than

[单项选择]It was in the United States that I made the ________ of Professor Jones.
A. acknowledgement
B. acquaintance
C. recognition
D. association

[单项选择]How many states are there in the United States


A. Thirteen.
B. Fifty.
C. Fifty one.
D. Sixty.

[单项选择]The United States is composed of fifty states, two of ______ are separated from the others by land or water.
A. them
B. that
C. which
D. those

[单项选择]

The United States government publishes guidelines for appropriate nutrient intakes These are known as the Recommended Dietary Allowances (RDAs) and are updated regularly based on new research in the science of nutrition. RDAs are suggested amounts of calories, protein, and some minerals and vitamins for an adequate diet. For other dietary substances, specific goals must await further research. However, for the U.S. population as a whole, increasing starch and fiber in our diets and reducing calories (primarily from fats, sugar, and alcohol) is sensible. These suggestions are especially appropriate for people who have other factors for chronic diseases such as family history of obesity, premature heart disease, diabetes, high blood pressure, and high blood cholesterol, or for those who use tobacco. Snacks can furnish about one-fourth of the calorie requirements among teenagers Those snacks should also furnish much of the day's allowances for protein, minerals, and vitamins. Sa
A. protein
B. fats
C. starch and fiber
D. sandwiches