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【单选题】
( )发明了木活字和转轮排字架,使拣字、排字、印刷都得以完善。A.
B.
C.
D.
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举一反三
【简答题】画图，并根据括号内的意思涂色。 tofu green beans fish tomato eggplant (white) (green) (orange) (red) (purple)
【简答题】The ocean contains many strange and surprising creatures. One such creature is the puffer fish. This very strange fish is probably the most poisonous creature in the ocean. The poison that this fish p...
【单选题】The fossil fish from the Green River(Paragraph 3) were probably preserved because they were
A.
in a deep lake.
B.
covered by sediment.
C.
protected by oil.
D.
buried slowly.
【简答题】阅读理解。 Mr.Green likes fish very much. He often buys some fish in the shop and takes it home. But when his wife sees the fish, she says to herself, “Good ! I can ask my friends to have lunch, and we can...
【多选题】汽车空调制冷系统中常用的压缩机类型有( )等多种。 A 、斜盘式 B 、叶片式 C 、柱塞式 D 、涡旋式 E 、曲柄连杆式
A.
1
B.
2
C.
3
D.
4
E.
5
【简答题】汽车常用的压缩机有（）、摆动斜盘式、旋转式等。
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