钻机液压盘式刹车可分为杠杆钳液压加压式和固定钳液压加压式两种类型。
参考答案：错
The future of developing countries__________ the hands of children, which is __________education and training for young people is important.
A．lies in/why
B．is put/ because
C．is laid/ the reason
D．depends on/why
(one, two, three, four, five / book, books) __________________
(one, two, three, four, five / book, books) __________________
(one, two, three, four, five / book, books) __________________
(one, two, three, four, five / book, books) __________________
(one, two, three, four, five / book, books) __________________