单项选择题

Many houses could be warmer if they were_______ so that the heat is not lost.

A．insulated
B．simulated
C．stimulated
D．radiated
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单项选择题
The map was drawn to the standard______ of 1 100,000, so there was not much detail.
A．route
B．latitude
C．rate
D．scale
单项选择题
I must be going now;______, if you want that book I'll bring it next time.
A．occasionally
B．accidentally
C．incidentally
D．recklessly
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