练习题的英文：
1.exercises; problems of an exercise

参考例句：

The exercise is that difficult!
练习题那么难！

When you' ve copied down the exercise that' s on the blackboard, we' ll go on with the next one
等你们抄好黑板上的这道练习题，我们继续做下一道练习。

exercises是什么意思：
n.
1.[C,U]运动，锻炼
2.[C]练习，习题
3.[C]【军】演习，操练
4.（特定的）活动，行动(+in)
5.（权力，权利等的）行使，运用(+of)
6.【美】仪式，典礼
7.礼拜，宗教仪式
v.[T]
1.锻炼，操练，怜惜
2.运用，行使
3.使忙碌，使担忧，使惊恐
v.[I]练习，运动

The exercise is that difficult!
练习题那么难！

morning exercises and setting - up exercises duringthe break
早操和课间操

Exercise stimulates the flow of blood.
锻炼促进血液循环。

problems是什么意思：
n. 难题，困难；逻辑题

It was a complex problem.
这是一个复杂的问题。

Is the problem that easy?
问题有那么简单吗?

This is a prime problem.
这是一个有关质数的问题。

exercise是什么意思：
n. 运动，锻炼；练习，习题
v. 锻炼，操练，练习

The exercise is that difficult!
练习题那么难！

morning exercises and setting - up exercises duringthe break
早操和课间操

Exercise stimulates the flow of blood.
锻炼促进血液循环。