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【简答题】
集热蓄热墙体所用材料有砖、土坯、混凝土和水等。为了提高墙体的吸热率 , 墙体的表面通常涂成___色或____等。
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反馈参考答案：
举一反三
【简答题】何首乌来源于 () 科,药用部位是 () 。
【单选题】As the director can't come to the reception, I'm representing the company __________.
A.
on his account
B.
on his behalf
C.
for his part
D.
in his interest
【单选题】--------- Come and join us, Jim! ---------- I’m sorry I can’t . If I _______ time, I would certainly go.
A.
will have
B.
have had
C.
had
D.
had had
【单选题】——Can you come and play basketball with us? ——______ .
A.
Sorry, I can't. I have to finish my homework first
B.
No, I am not. I'm very busy now
C.
Yes, I do. I like it very much
【简答题】Thank you very much for your _________(invite). But I’m so sorry that I can’t come to your party tomorrow.
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