[单项选择]In a microwave oven, radiation penetrates food and is then absorbed primarily by water molecules, caused heat to spread through the food.

[单项选择]Food prices
A. will not rise this year.
B. will fall down till the new year.
C. will rise up until after the new year.
D. will hold down not until the new year.

[填空题]Ultraviolet radiation is known to cause skin cancer and has damaging effects on______.

[填空题]Increased ultraviolet radiation would lead to a growing number ______.

[简答题]

Radiation occurs from three natural sources: radioactive material in the environment, such as in soil, rock, or building materials; cosmic rays; and substances in the human body, such as radioactive potassium in hone and radioactive carbon in tissues. These natural sources account for an exposure of about 100 millirems a year for the average American.
The largest single source of man-made radiation in medical x-rays, yet most scientists agree that hazards from this source are not as great as those from weapons-test fallout, since strontium-90 and carbon-14 become incorporated into the body, hence delivering radiation for an entire lifetime. (46) The issue is, however, by no means uncontroversial; indeed, the last two decades have witnessed intensified examination and dispute about the effects of low-level radiation.
A survey conducted in Britain confirmed that an abnormally high percentage of patients suffering from arthritis of the spine who had been treat

[填空题]The harm the electromagnetic radiation does to people’s health is as great as or even greater than that cigarette smoking does.

[单项选择]

Oven instructions

The first time you use this appliance, close its door, set the temperature dials to their highest levels and let the appliance operate for half an hour empty. Then, turn the oven off and open its door for at least twenty minutes The odor that is often detected in rooms at this time is caused by chemicals that covered the appliance while in storage. When the appliance is used a second time, it should be absent. After this preparatory phase, the oven will be available for further use as required.
Heating coils are present in the oven side walls and bottom. Never place any item on the bottom inside of the oven, as it could create a fire hazard. Always place your cookware on the center of any of the three racks inside, and monitor the appliance while in operation.
What may happen during the oven’s first use
A. Dials may be difficult to turn.
B. Storage chemicals may harden.
C. Temperatures may rise slowly.
D. Smells may emerge from inside.

[单项选择]A company purchased a new pizza oven directly from Italy for $ 12675. It will work for 5 years and has no salvage value. The tax rate is 41 percent, and annual revenues are constant at $ 7192. For financial reporting, the straight-line depreciation method is used, but for tax purposes depreciation is accelerated to 35 percent in years 1 and 2, and 30 percent in year 3. For purposes of this exercise ignore all expenses other than depreciation. Assume the tax rate for years 4 and 5 changed from 41 percent to 31 percent. What will be the deferred tax liability as of the end of year 3 and the resulting adjustment to net income in year 3 for financial reporting purposes due to the change in the tax rate Deferred Tax Liability Net Income ①A. $1572 $ 507 ②B. $1572 $ 747 ③C. $1039 $ 5O7