血精的病位在（）
A.前列腺
B.精囊
C.睾丸
D.附睾
E.输精管
参考答案：B
用单词的适当形式填空。
1. Now Jenny and Danny are ____________ (play) cards.
2. Jenny is ____________ (sit) in the chair.
3. Li Ming is ____________ (write) a letter.
4. Kim is ____________ (sit) beside Peter.
按饱和单轴抗压强度，岩石的坚硬程度如何分类？
