最早的真空处理的目的是为了降低钢液中（）的含量。
A.[N]
B.[H]
C.[O]
参考答案：B
下列物质中含有氧分子的是[ ]
A．H2O2
B．MnO2
C．CO2
D．O2
Busy and successful as he was, the novelist was willing to _____ any promising young man and give him all the help he could.
A．take up
B．pick up
C．make up
D．look up
