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。()