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【简答题】
根据句意及汉语提示完成下列句子 1. My mother bought me a （围巾）as a birthday present. 2. （每个人）is having a good time at the party. 3. We are very____（放松的）on the beach 4. Where are they going on （度假）? 5. In this____（热天）,I only want to stay at home.
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举一反三
【简答题】What did the thief take from the shop?
【单选题】— What did you do this morning? — I went _____. [ ]
A.
shop
B.
shops
C.
to shop
D.
shopping
【简答题】单位长度的光学密度D0和____正相关
【简答题】厚度为 2.0m 的烟气层, 测得 有 30% 的光穿过,计算单位厚度上烟气的光学密度为( )及烟气的消光系数为( ) m -1 。结果保留三位有效数字,不用写单位。
【单选题】What is special about the shop's service?
A.
The shop guarantees the battery for a year.
B.
The man will clean it at no extra charge.
C.
The man can repair watches very quickly.
D.
The shop is offering a special discount.
【单选题】—What’s Jack up to in the shoe shop? He’s there for ages. —It’s ______ that he hasn’t decided which pair to buy.
A.
sure
B.
obvious
C.
confusing
D.
curious
【简答题】有一组样本数据8，x，10，11，9，已知它们的平均数为10，则这组数据的方差s 2 ＝ ▲ ．
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