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【单选题】
为了保证镗杆和有足够的刚性,加工孔径在30〜120 mm范围内时,镗杆直径一般为孔径的( )较为合适。A.
1倍
B.
0.8
C.
0.5
D.
0.3
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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)
【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...
【简答题】下列一般要饭后服用的药剂( )。A.滋补剂B.安神剂C.解表剂D.对胃产生刺激的药剂E.攻下剂A. 1 B. 1 C. 1 D. 1 E. 1
【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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