[填空题]A banana has more food value than an apple.

[单项选择]Which country has more people than any other country in the world

[单项选择]More than a year has passed since the space shuttle Columbia broke into pieces over central Texas. This past January President Bush announced a long-term program of space exploration that would return human beings to the Moon, and thereafter send them to Mars and beyond. As this magazine (Natural History) goes to press, the twin Mars Exploration Rovers, Spirit and Opportunity, are wowing the scientists and engineers at the rovers’ birthplace--NASA’s Jet Propulsion Laboratory (JPL)--with their skills as robotic field geologists. JPL’s official rover Web site is being stampeded by visitors. The confluence of these and other events resurrects a perennial debate: with two shuttle failures out of 112 missions, and the astronomical expense of the manned space program, can sending people into space be justified, or should robots do the job alone
Modern societies have been sending robots into space since 1957, and people since 1961. Fact is, it’s vastly cheaper to send robots: in most cas
A. A．1) most probably means ______ . hacked severelyB. clicked frequentlyC. closed foreverD. neglected purposely

[填空题]A gram of fat has more calories than a gram of protein, so we need to eat more fat.

[填空题]The book has more than one author.

[填空题]Who has owned more than 50 domain names
A. A．George W. Bush
B．Kelsey Grammar
C．Bonita Card.

[单项选择]

The food you eat does more than provide energy. It can have a dramatic effect on your body’s ability to fight off heart disease, cancer, diabetes, high blood pressure, stroke, and weak bones. With remarkable consistency, recent research has found that a diet high in plant-based foods—fruits, vegetables, dried peas and beans, grains, and starchy staples such as potatoes—is the body’s best weapon in thwarting many health-related problems. These foods work against so many diseases that the same healthy ingredients you might use to protect your heart or ward off cancer will also benefit your intestinal tract and bones.
Scientists have recently estimated that approximately 30 to 40 percent of all cancers could be averted if people ate more fruits, vegetables, and plant-based foods and minimized high-fat, high-calorie edibles that have scant nutritional value. Up to 70 percent’ of cancers might be eliminated if people also stopped smoking, e
A. Today you can get calcium without eating any high-fat or high-calorie foods by choosing skim milk or low-fat yogurt.
B. Calcium plays an important role in the movement of protein and nutrients inside cells.
C. You can rely on pills instead of a calcium-rich diet to take enough calcium.
D. If you want to absorb calcium, you should expose yourself to the sun’s rays.