第15题: [单项选择]前交叉韧带() A. 伸膝最紧张,防止胫骨前移 B. 屈膝最紧张,防止胫骨前移 C. 伸膝最紧张,防止胫骨后移 D. 屈膝最紧张,防止胫骨后移 E. 伸膝最松弛,防止胫骨前移 参考答案:A 答案解析:膝交叉韧带牢固地连结股骨和胫骨.可防止胫骨沿股骨向前、后移位(前交叉韧带在伸膝时最紧张,能防止胫骨前移;后交叉韧带在屈膝时最紧张,可防止胫骨后移)。
第30题: [单项选择]This book will show the readers ______ can be used in other contexts. A. how that they have observed B. that how they have observed C. how what they have observed D. that they have observed 参考答案:C 答案解析:名词性从句。连接副词how引导一个宾语从句,而what引导的名词性从句在宾语从句中充当主语。