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【单选题】
二灰稳定土中的二灰是指( )。A.
石灰和粉煤灰
B.
水泥和粉煤灰
C.
火山灰和粉煤灰
D.
石灰和火山灰
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举一反三
【单选题】He's inherited his father's _______temper.
A.
prosperous
B.
confident
C.
simple
D.
explosive
【简答题】My friend Alice visited my city last week . She arrived in Hong Kong on Wednesday morning .She is from Australia. I showed her around the city. We visited the Clock Tower first. The Clock Tower was ve...
【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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