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【单选题】
糖在机体内最主要的生理作用A.
作为机体组织结构成份
B.
参与信息传递
C.
提供能量
D.
作为机体重要的碳源
E.
作为遗传物质的组成成份
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举一反三
【单选题】—Mum, look! My trousers _____ short. Can you buy me a new _____? —OK.
A.
is; one
B.
are; one
C.
are; pair
D.
is; pair
【简答题】电荷有规则的定向移动称为电流。凡大小和方向都随时间变化的电流称为()。 (A)直流电流 (B)稳衡电流 (C)交流电流 (D)稳压电流
【简答题】读句子，排序。 ( ) Good morning. Where are you going this afternoon? ( ) At 3 o'clock. ( ) Buy a pair of shoes. ( ) When are you going? ( ) Good morning. ( ) What are you going to do?...
【单选题】These are ______________. You can buy a pair for your mother. [ ]
A.
woman sock
B.
women sock
C.
women socks
D.
woman socks
【单选题】You can help a disaster victim buy a new pair of glasses if you donate ______.
A.
$5
B.
$10
C.
$25
D.
$50
【单选题】could you tell me___? Yes. Walk on, you can find a shoe store
A.
where can I buy a pair of shoes
B.
where I can buy a pair of shoes
C.
what can I buy a pair of shoes
D.
what I can buy a pair of shoes
【简答题】岩层的产状要素包括
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