在蛋白质生物合成中，催化肽键形成的酶是

A．转肽酶

B．氨基肽酶

C．羧基肽酶

D．氨基酸合成酶

E．氨基酸连接酶

It is in the factory________you're going to pay a visit to________this kind of computer is made.[      ]

A. /; that  

B. where; that

C. /; where  

D. that; which