DNA复制需要
A.拓扑异构酶
B.RNA聚合酶
C.DNA连接酶
D.解链酶
参考答案:A,B,C,D
.They were known as “ aborigines”, _____ “the first people of the country”.
A.it means
B.which mean
C.that means
D.meaning
1250平方米=______公顷
125克=______千克.