[单项选择]Pet owners can earn from（）per day.
A. $100 to $200
B. $200 to $400
C. $400 to $500
D. $500 to $600

[单项选择]Production engineers from headquarters can give instructions to the production engineering manager in a factory only with permission from ______.
A. the general manager there.
B. the engineering manager there.
C. the chief production engineer at headquarters.

[填空题]Signals received from satellite can help gather data.

[单项选择]

Anxiety disorders are common and range from 10 percent to 20 percent of children and teens. Girl are usually more likely than boys to report anxiety symptoms or signs. Anxiety runs in families due to a combination of inherent and environmental factors. Anxious parents may produce anxious children. When signs are so severe that they interfere with daily life activities, it is time to seek an evaluation from a mental health professional.
Consider the following example of a child who suffered stress disorder. Maria, age 12, was at her physician’s office awaiting her yearly checkup. A bullet from a gun battle in the next building tore through the wall and struck her mother in the shoulder, severely wounding her. The mother was rushed to the hospital, but Mafia did not know her fate for several days.
Unable or unwilling to speak, visibly anxious and fearful, Mafia was evaluated by a child doctor in the same hospital several days later. He recommended a brief trea
A. analyzable
B. unavoidable
C. uncontrollable
D. communicable

[填空题]Even genes from animals can be used to engineer crops.

[单项选择] As countless photos from space can prove, the Earth is round the "Blue Marble," as astronauts have affectionately dubbed it. Appearances, however, can be deceiving. Planet Earth is not, in fact, perfectly round. This is not to say the Earth is flat. Well before Columbus sailed the ocean, Aristotle and other ancient Greek scholars proposed that Earth was round. This was based on a number of observations, such as the fact that departing ships seemed to be smaller as they sailed away, as one might expect if sailing across a ball says scientist Bill Carstensen of Virginia Tech in Blacksburg. Isaac Newton first proposed that Earth was not perfectly round. Instead, he suggested it was an oblate spheroid(扁球体) a sphere that is squashed at its poles and swollen at the equator. He was correct and, because of this bulge, the distance from Earth’’s center to sea level is roughly 21 kilometers greater at the equator than at the poles. Our globe, however, is not even a perfect oblate
A. A number of photos from space show us that the earth is not round.
B. People think the earth is fiat, since its appearance deceived people.
C. Aristotle denied that the earth is flat, basing on the fact that Columbus sailed the ocean.
D. Tile fact that ships appeared smaller when they sailed away showed the earth is round.

[填空题]What can you learn from stamps
We can learn many things about （） from stamps.

[填空题]What can you learn from stamps We can learn many things about ______ from stamps.

[填空题]What can we get from library We can get all kinds of______.

[单项选择]If the price of product X increases from $2.00 per unit to $ 2.25 per unit, the demand will decrease from 7.5 million units to 6.7 million units. What is the price elasticity of demand for the product, and is the demand for the product elastic or inelastic（）
A. -1.04; elastic.
B. -0.96; elastic.
C. -0.96; inelastic.