隧道爆破中,导爆管不能直接起爆炸药,必须借助()来起爆药卷。
A、火雷管
B、导火索
C、导爆索
D、非电毫秒雷管
参考答案:D
用所给词的适当形式填空。
1. Everyone wants ________ (go) there.
2. The tigers enjoy_________(eat) meat.
3. The children ________ (lie) on the grass now.
4. I often do some________ (read) on Sundays.
5. It's time for him, they stop__________ (play) soccer.
莪术抗癌作用的机制是
A.抑制肿瘤细胞蛋白质合成B.对癌细胞有直接杀灭作用C.增加肿瘤组织血流量D.抑制肿瘤细胞核酸合成E.以上均非