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【简答题】
解释何谓切削运动？
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举一反三
【单选题】Where does Lily come from?
A.
She comes from England.
B.
She comes from America.
C.
She comes from Canada (加拿大).
【单选题】Not until Hellen had heard that sound______.
A.
was she really frightened
B.
was really she frightened
C.
She was really frightened
D.
she really was frightened
【简答题】下图所示为胡萝卜的韧皮部细胞通过无菌操作，接入试管后，在一定条件下形成试管苗的培育过程，请据图回答下列问题。 (1)要促进细胞分裂生长，培养基中应有营养物质和激素。营养物质包括____和小分子有机物，激素包括细胞分裂素和____两类植物激素。 (2)此过程依据的原理是____。A和B阶段主要进行的分裂方式是____，B阶段除了细胞分裂外，还进行细胞____等。 (3)A阶段是____形成愈伤组织的...
【单选题】He's inherited his father's ( )temper.
A.
explosive
B.
explode
C.
exploded
D.
exploding
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