单选题Listentopartofaconversationbetweentwostudents.Nowgetreadytoanswerthequestions.Youmayuseyournotestohelpyouanswer.

单选题FREEZING FOOD 1 The discovery of freezing has changed our eating habits more than any other related invention. Because many foods contain large amounts of water, they freeze solidly at or just below 32 degrees Fahrenheit. When we lower the temperature to well below the freezing point and prevent air from penetrating the food, we retard the natural process of decay that causes food to spoil. Freezing preserves the flavor and nutrients of food better than any other preservation method. When properly prepared and packed, foods and vegetables can be stored in the freezer for one year. 2 Most vegetables and some fruits need blanching before they are frozen, and to avoid this step would be an expensive mistake. The result would be a product largely devoid of vitamins and minerals. Proper blanching curtails the enzyme action, which vegetables require during their growth and ripening but which continues after maturation and will lead to decay unless it is almost entirely stopped by blanching. This process is done in two ways, either by plunging vegetables in a large amount of rapidly boiling water for a few minutes or by steaming them. For steam blanching, it is important that timing begin when the water at the bottom of the pot is boiling. Different vegetables require different blanching times, and specified times for each vegetable must be observed. Underblanching is like no blanching at all, and overblanching, while stopping the enzyme action, will produce soggy, discolored vegetables.

单选题According to the passage, what is the effect of Jupiter's other large moons on Europa?

单选题The Crow Blackfoot, and Sioux tribes (traditionally) adorned (they) dwellings and costumes with (colorful) and highly valued beaded (decorations).

单选题Established in 1860, the Government Printing Office prints and binds documents for all department of the United States government.

单选题Listening2"SociologyClass"

单选题Despite the growth of manufacturing and other industries, the economy A B of the state of Texas has remained heavily dependence on oil and gas. C D

单选题San Diego has a diverse economy, deriving substantial revenue from manufacturing, maritime commerce, military installations, and agricultural active in the surrounding area.

单选题(In) warm-blooded animals, body temperature (are) maintained within narrow (limits) regardless of the temperature of the animals’ (surroundings).

单选题Listening7"Library"

单选题Hares generally have longer ears and hind legs than rabbits and move by jumping _____ running.

单选题Not much is it known about the details of the development and acquisition of primate communication, especially in the wild.

单选题The passage suggests that the speed at which communication through pheromones occurs is dependent on how quickly they

单选题Listen to Track 11. A. Other students should comment on the man's remark. B. Most people would agree with the man's opinion. C. Artwork funded by the government is usually of excellent quality. D. The government project was not a waste of money.

单选题(The fact that) white light is light (composed of. various wavelengths may be (demonstrating. by dispersing a beam of (such) light through a prism. A. The fact that B. composed of C. demonstrating D. such

单选题The word "heightened" in line 18 is closest in meaning to

单选题The taller of all animals, a full-grown giraffe may be eighteen feet or more high.

单选题Titanium has the (strength) of steel but weighs (half only) as much, hence its (advantage) for use (in aircraft).

单选题The word "graphic" in line 9 is closest in meaning to