通常情况下岩石越坚硬，需要的炮眼就越多。
参考答案：对
–How about the exhibition that day?
--It was very noisy, but that didn’t ________ me.
A．hurt
B．impress
C．change
D．bother
可经脑脊液循环通路播散的肿瘤有（）
A.成血管细胞瘤
B.生殖细胞瘤
C.恶性畸胎瘤
D.髓母细胞瘤
E.星形细胞瘤1级
