贯穿脊髓全长的纤维束有（）
A.楔束
B.薄束
C.皮质脊髓前束
D.红核脊髓束
E.脊髓小脑后束
参考答案：B, D
He hurt his leg climbing the mountain; otherwise, he _____ the meeting.
A．will attend
B．had attended
C．would have attended
D．would attend
溶性岩石是形成喀斯特的内因，（）是喀斯特发育的外因。
He hurt his leg climbing the mountain; otherwise, he _____ the meeting.