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【单选题】
直径为 D ,过渡圆弧半径为 r 的碟形封头过渡圆弧与直边交点处过渡圆弧上的第一、第二曲率半径分别是:A.
ρ1=r，ρ2=D/2
B.
ρ1=D/2，ρ2=r
C.
ρ1=∞，ρ2= D/2
D.
ρ1=∞，ρ2=r
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举一反三
【单选题】We will have to rely more on ________ energy, such as solar and wind power.
A.
alterations
B.
alternative
C.
transformation
D.
transformer
【简答题】苏州城市及景点介绍(补2)
【简答题】a. Almost 20,000 euros. _________b. As I said, it's been doing extremely well and we expect a considerable increase in the winter._________ c. In late spring. _________ d. So far it's been doing v...
【简答题】将十六进制数1A2D转换为十进制数是 。
【单选题】You may succeed in selling a product when your customer
A.
feels he needs your product
B.
thinks your product is cheap
C.
likes you
D.
is comfortably seated
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