脂肪酸氧化的限速酶是（）
A.脂酰辅酶A合成酶
B.肉毒碱脂酰转移酶Ⅰ
C.脂酰辅酶A脱氢酶
D.硫解酶
E.△2烯酰水化酶
参考答案：B
Was it at five o’clock ______the fire broke out？
A．when
B．that
C．which
D．in which
手机上网时采用的地址为（）。
A.IMSI
B.IP address
C.IPX address
D.MAC address
