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【单选题】
关于向量的,下列结论中哪个是正确的 ?A.
所有分量的绝对值之和称为 2- ；
B.
所有分量的绝对值之和称为 1- ；
C.
所有分量的平方和称为 2- ；
D.
所有分量的绝对值之和再开方称为 1- 。
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反馈参考答案：
举一反三
【简答题】Translation :我听说车站附近有个很好的餐馆。
【简答题】在自由基反应中化学键发生 ( ) 异裂 B. 均裂 C. 不断裂 D. 既不是异裂也不是均裂
【简答题】( 1010101 )2=(________)16
【单选题】听力原文： There are big cultural differences between British shoppers and shoppers in continental Europe when it comes to credit cards. Shopping by credit card in Britain is rising: it increased by ￡ 400 ...
A.
The British and other Europeans use credit cards in the same way.
B.
The British use credit cards more than other Europeans.
C.
The British use credit cards less than other Europeans.
D.
The British and the French use credit cards in the same way.
【简答题】( 1010101) 2 =( ) 16 =( ) 10
【单选题】Why do some shoppers use social media on Nobember 11th?
A.
To post pictures of the food they have eaten.
B.
To show pictures of what they have bought.
C.
To send messages of thanks to shops.
【单选题】Why do some shoppers use social media on November 11th?
A.
a.To post pictures of the food they have eaten.
B.
b.To show pictures of what they have bought.
C.
c.To send messages of thanks to shops.
【简答题】写出“ ch é ngk ě n ”这个词 。
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