The new survey shows that the number of students ______ computer games has been on the

increase in recent years.[ ]

A. devoted to  

B. addicted to

C. connected to  

D. related to

异种钢焊接时，并不是沿着熔合线都会形成（）脆性层，而是多产生于熔敷金属流动迟滞的熔合线部位，或焊条金属不能充分到达的部位。

A.铁素体

B.珠光体

C.马氏体

D.魏氏体