渗碳体是铁与碳形成的化合物，含碳为（）%。
A.0.8
B.6.69
C.2.11
参考答案：B
任选一个体能类田径项目，设计几种重复训练方法和间歇训练方法，并举例说明在该项目的训练中采用重复训练法、间歇训练法的目的、作用和应用特点。
The reason _______ his going to Britain was ______ he got a new job there.
A．for; because
B．for; that
C．of; because
D．of; that
