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【多选题】
预应力提高了结构构件的（）A.
强度
B.
刚度
C.
抗裂度
D.
抗冻性
E.
耐久性
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反馈参考答案：
举一反三
【简答题】什么是正压电效应(顺压电效应)?
【判断题】Taylor 's Scientific Management Theory recognized the reasonableness of the workers to engage in the work for their economic benefit . ( )
A.
正确
B.
错误
【单选题】—May I speak to Tom? —Sorry, he isn’t in now. What’s up? —＿＿＿. —Sure, go ahead.
A.
May I take a message for him?
B.
May I leave a message?
C.
Hold on, please.
【单选题】How much is the orange?Two yuan a kilo.It_now
A.
on sell
B.
on sale
C.
at sale
D.
in sale
【单选题】How much is the orange?
A.
2 kilos
B.
2 yuan a kilo. It's on sale.
C.
It's red.
D.
Five.
【单选题】--How much is the orange?
A.
Two yuan a kilo. It is ___ now.
B.
on sell
C.
on sale
D.
at sale
E.
in sale
【简答题】在B栏中找出A栏英语句子的正确答句。 (A) ( )1. How much is the dress? ( )2. Are the shoes on sale? ( )3. Thanks! ( )4. How many pencils do you have? ( )5. How much are the pants? (B) A. You're welco...
【单选题】-- How much is the orange? -- _____.
A.
Two yuan a kilo.
B.
They're three yuan a kilo.
C.
It's on sale now.
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