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【单选题】
下列四种牌号的材料:1GCr15,2W18Cr4V,31Cr18Ni9Ti,460Si2Mn,合金元素总含量由小到大排序正确的是 .A.
a
B.
b
C.
c
D.
d
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【简答题】碳纤维制品,主要用于生产消防气瓶瓶身的缠绕材料
【单选题】When we speak to people, we should be ___.
A.
as polite as possible
B.
as polite as possibly
C.
as politely as possible
D.
as politely as possibly
【单选题】2 When we speak to people, we should be .
A.
as polite as possible
B.
as polite as possibly
C.
as politely as possible
D.
as politely as possibly
【简答题】读对话,选择句子补全对话 A.No,it's Sally.Have you finished your homework yet? B.Of course,I'd love to.When and where shall we meet? C.Hello.May I speak to Susan? D.Let's make it half an hour later. Sally : 1.___...
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