单项选择题
| Questions 11-13 are based on the following passage. You now have 15 seconds to read questions 11-13. |
How many solar heat panels do three or four bedroom homes usually need
- A．Three or four.
B．Five or six.
C．Seven or eight.
D．Twelve or more.
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单项选择题
Why is insulation required in new houses
A．To limit discussion on heating bills.
B．To prevent heat loss.
C．To determine temperature in homes.
D．To convert homes to electric heat. -
单项选择题
Which is not true about solar heat collector panels
A．They look like sandwiches.
B．They can heat but not cool homes.
C．They cost about ＄300 each.
D．They are placed on rooftops. -
单项选择题
What’s the problem with paper napkins and plastic food wraps
A．They can’ t be recycled though they help people save time on housework.
B．They become trash and therefore are harmful to the environment.
C．They add cost to the product and thus make it more expensive.
D．Sometimes they are not strong enough to hold the purchase.
