Miss Jones is a () engineer than miss Smith.
A.BEST
B.bad
C.worser
D.worse
参考答案:D
A.把铁丝反复弯曲,弯曲处变热
B.用酒精灯对烧杯中的水加热
C.山芋在炉膛内烤熟
D.烧开水时蒸汽将壶盖项起
真核生物DNA复制有哪些特点?