1mol任何气体的体积都是22.4L
参考答案:错
We all like the teachers _____ kind to us and strict with us. [ ]
A. who
B. who is
C. who are
D. whom
下列各组中,轴承及其代号对应正确的有()
A、0—深沟球轴承
B、1—圆柱滚子轴承
C、3—深针轴承
D、5—推力球轴承