71.
What is the main idea of the passage?
A. It mainly tells us how to treat
friends
B. It mainly introduces the
importance of friends
C. It mainly explains the lesson
for shaking off friends
D. It mainly gives advice on how
to make new friends
答案
68.C 69.B 70.C 71.A
Passage
42
(辽宁省沈阳二中2008届第四次模拟考试E篇)
When
you choose a freezer, remember it’s probably going to be with you for a long
time. So it’s important to know which freezer is right for your needs.
First, decide if you want an
upright or chest model. Uprights are more convenient. Their storage space is
more accessible and they take up less floor area. However, chest models are
more energy-efficient because less cold air escapes when they are open.
If you are buying an upright,
you’ll have to choose between frostless(无霜) or manual (手动的)defrost(解冻).
Chest freezers are always manual. Frostless freezers automatically defrost at
present intervals(每隔一段时间) and remove the water. Manual models must
be defrosted by hand every few months or whenever frost pile up to about a quarter
of an inch.
To help your freezer reach a ripe
old age, try to find a spot that’s cool, dry, and away from drafts(精棉).
Drafts and heat will raise the freezer’s cabinet temperature, which makes it
work harder to keep cool. That means wasted energy. That means wasted energy
and a shortened life.
Dry air is important because high
humidity (湿气) can cause the freezer to rust outside
and frost up inside. With proper care, a freezer can serve you for 15 years or
more. Regular cleaning and simple maintenance will help it maintain a
zero-degree temperature and keep it smelling fresh and looking almost new.
Frostless models requires less
care than manual defrost freezers. The inside of a frostless unit should be
washed periodically with warm water and baking soda or a mild soap, rinse, and
dried.
Good habits go a long way toward a
freezer that runs efficiently. To get the most from your freezer, check
regularly to make sure it’s providing a true zero-degree temperature.
Keep the freezer at least three-quarters
full. The emptier it get, the more energy is wasted. If more than three pounds
of food per cubic foot of storage space is added every 24 hours, the resulting
high or low temperature can damage the food.
