工地上有a吨水泥，每天用去3.5吨，用了b天．用式子表示还剩的吨数是______吨．
还剩的吨数为：（a-3.5b）吨．
故答案为：（a-3.5b）．
马克思主义哲学在哲学对象上的革命表现为______。
A．哲学是科学之科学
B．哲学是整体，科学是部分
C．哲学研究世界的本质，科学研究世界的现象
D．哲学是关于自然、社会、思维发展的一般规律的科学
句型转换。
1. What other things did you do on your day off? (变为同义句)
_____ _____ did you do on your day off?
2. Our class had a great time on the school trip. (变为同义句)
Our class _____ _____ on the school trip.
3. Our school trip was very interesting. (对画线部分提问)
_____ _____ your school trip?
4. There was only one sandwich. (对画线部分提问)
_____ _____ _____ _____ there?
5. He met Tina on his way home. (变为否定句)
He _____ _____ Tina on his way home.
