高炉生产中的主要原燃料是铁矿石及其代用品、锰矿、熔剂和（）等。
参考答案：焦炭
.
If you find Tom hard ____, you’d better keep away from him.
A．to get along with
B．to get along
C．to be got along with
D．getting along with
A．牛顿
B．卡文迪许
C．爱因斯坦
D．开尔文
