单项选择题
| Questions 14-16 are based on the following passage. You now have 15 seconds to read questions 14-16. |
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.
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A．It is very well established.
B．It is relatively new.
C．It is found in one million homes.
D．It is being rapidly expanded. -
单项选择题
What is the main topic of the lecture
A．Bicycles and cars.
B．Building codes.
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