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【简答题】
能使混凝土迅速凝结的外加剂是()
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皮皮学刷刷变学霸
举一反三
【单选题】I. Listen to five questions. Choose a proper response for each question you hear. Each question will be spoken only once.
A.
I lived in Australia for a year and I just picked it
B.
I love America and I’d like to live there.
C.
Canada is a great place for studying.
【单选题】A派生出子类B,B派生出子类C, 1 . A a0 = new A() 2. A a1 = new B() 3. A a2= new C() 下列说法z正确的是()
A.
只有1能通过编译
B.
1，2能通过编译，3 不能通过编译
C.
1，2，3都能通过编译，但2，3 会运行错误
D.
1，2，3的声明都是正确的
【单选题】Listen to five questions and choose the appropriate answers.
A.
What do you suggest?
B.
Can you tell how?
C.
Sorry about that!
D.
Hmm… so do I.
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