如图所示,梯形ABCD,AD∥BC,DE⊥BC,现在假设AD、BC的长度都减少10%,DE的长度增加10%,则新梯形的面积与原梯形的面积相比,会怎样变化?( )
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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