Some crystals emit visible light when ______ by ionizing particles.A、burnedB、st

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问题 Some crystals emit visible light when ______ by ionizing particles.

选项 A、burned
B、struck
C、excited
D、inspired

答案 B

解析句意：一些水晶在被电离粒子撞击后会发出可见光。strike撞击，碰撞。burn灼烧。excite激发，引起。inspire鼓舞，激励。

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Somecrystalsemitvisiblelightwhen______byionizingparticles.A、burnedB、st