当采用刚性卸料装置时，其总工艺力为P∑=P+P卸+P推。

在人与自然和谐相处中实现人与动物和谐相处、可持续发展，是因为( )。

A．人类是从动物长期进化而来的

B．人类社会与动物界都是客观的

C．任何事物之间都存在必然联系

D．世界是一个普遍联系的统一整体

根据括号内的要求完成下列句子。

1. Tom has to stay at home on Sunday. (改为否定句)

    Tom _____ _____ to stay at home on Sunday.

2. He can seldom finish his homework by himself, _____ _____? (反意疑问句)

3. The teacher told us it. England is an island. (改为宾语从句) 

    The teacher told us England ______ an island.

4. The Pacific Ocean is the largest ocean in the world. (同义句)

    The Pacific Ocean is larger than ______ _____ ocean in the world.

5. It is a nice sunny day today. (感叹句)

    _______ _______ nice sunny day it is today!

向H₂SO₄和CuSO₄的混合溶液中不断加入NaOH溶液，下面的曲线正确的是      [ ]

A.

B.

C.

D.

容器设计必须考虑的因素有哪些？

计算题：某高炉矿批18t，其中烧结矿16t，品位58%；球团矿2吨，品位62%。求每批料理论铁量？