皮皮学，免费搜题
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【单选题】
在鉴定淀粉存在时，常用碘液，这是因为（ ）A.
有机物遇碘变成蓝色
B.
淀粉遇碘不变色
C.
淀粉遇碘变成蓝色
D.
淀粉遇碘不变蓝色
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皮皮学刷刷变学霸
举一反三
【简答题】You must learn to balance (yourself) when you ride a bicycle.(英译汉)
【简答题】If you want to make ________ way in the world, you must learn to work hard while you are still young.
【单选题】You must learn to consider all possible results you begin to carry out your plan.
A.
although
B.
before
C.
because
D.
unless
【单选题】Unless you are willing to let others control your time, you must learn to politely say no to other people's requests.
A.
Unless you are willing to let others control your time
B.
you must learn to politely say no to other people's requests.
【单选题】--- Miss Jones ______music at Eton School for ten years. --- No wonder I often hear her singing in her garden.
A.
teaches
B.
used to teach
C.
is teaching
D.
has been teaching
【多选题】下列性质属于力学性质的有( )。
A.
强度
B.
硬度
C.
弹性
D.
脆性
E.
CD
F.
下列材料中，属于复合材料的是( )。
G.
钢筋混凝土
H.
沥青混凝土
I.
建筑石油沥青
J.
建筑塑料
【单选题】If you want to be a factory manager, you must learn to make machines. [ ]
A.
what
B.
when
C.
where
D.
how
【简答题】下列性质属于力学性质的有()
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