You must cut off the electricity before you change the bulb为什么要用两个the

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• The light in the room must be turned offThe light in the room must be turned off before you leave .为什么要用must be 不是填must turn off
• 翻译：Before you examine the wire,you must cut off the electricity.
• You must cut off the electricity before you change the bulb为什么要用两个the
• 翻译：Before you examine the wire,you must cut off the electricity.
• You must cut off the electricity before you change the bulb为什么要用两个the
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• in the diagram ABCDEF is a prism of length 36cm the cross-section ABC is a right-angled triangleAB=19cm and AC=14cm Calculate (a)the length BC (b)the total surface area of the prism (c)the volume of the prism (d)the length CE (e)the angle between the line CE and the base ABED加495218975题目图片给你 级别太低不能插图片