皮带输送机的作用是达到（）的目的。
A、筛分物料
B、输送物料
C、使物料均匀
D、减少物料造碎
参考答案：B
To good relationships with your teachers and classmates, you should learn to be on good terms with them.
A．bring up
B．add up
C．keep up
D．take up
新生儿败血症早期症状不典型。()
