题目：
脑膜瘤栓塞时，所用固体栓子的大小为（）
A.100～150μm
B.150～250μm
C.50～100μm
D.小于50μm
E.250～300μm
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B
脑膜瘤栓塞时，所用固体栓子的大小为（） A.100～150μm B.150～25
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