2. 专升本
  3. With a standard bulb, only 5% of the electricity is ______to light—the rest is wasted away as heat.

With a standard bulb, only 5% of the electricity is ______to light—the rest is wasted away as heat.

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问题 With a standard bulb, only 5% of the electricity is ______to light—the rest is wasted away as heat.
选项 A、compressed
B、conformed
C、converted
D、confined
答案C
解析 电转换成光，用convert into／to。
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