【单选题】
上浆、上粉、拌粉所用淀粉的化学性质中，淀粉颗粒分散在水中后，在适当的温度下（ ）会发生溶胀变化，形成均匀糊状溶液，这个过程叫淀粉（ ）。
①
溶解
②
老化
③
溶化
④
糊化
【单选题】
正投影法中，投影面、观察者、物体三者相对位置是( )
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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人——面——物
②
Normal
0
7.8 磅
0
2
false
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EN-US
ZH-CN
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物——人——面
③
Normal
0
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2
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C. 人——物——面
④
Normal
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7.8 磅
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ZH-CN
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面——人——物
【多选题】
力是物体与物体之间的相互机械作用，这种作用的效果是（ ）。
①
使物体的运动状态发生改变
②
仅使物体的形状发生改变
③
仅使物体的运动方向发生改变
④
使物体的形状发生改变
⑤
使物体静止