当昼夜平均气温高于（）℃，混凝土施工应按夏（热）期施工处理。_爱下问搜题

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问题单项选择题

当昼夜平均气温高于（）℃，混凝土施工应按夏（热）期施工处理。

A、20

B、30

C、45

答案

参考答案：B

补全对话，情景问答

从B栏中为A栏选出恰当的答语。

                      A
( ) 1. Have you got a tiger?
(    ) 2. Excuse me, where's the supermarket, please?
(    ) 3. Thank you. Bye-bye.
(     ) 4. Thank you so much.
(    ) 5. What's this?

             B
A. You are welcome.
B. Goodbye.
C. It's a yellow cap.
D. No, I haven't.
E. Go straight on. Turn left.

单项选择题

儿童最常见的眼眶良性肿瘤( )

A．毛细血管瘤
B．海绵状血管瘤
C．视神经胶质瘤
D．皮样囊肿
E．横纹肌肉瘤