试题与答案

下列哪种物质能用作混悬剂的助悬剂 () A.硬脂酸钠 B.海藻酸钠 C.羧甲基纤维

题型:单项选择题 A型题

题目:

下列哪种物质能用作混悬剂的助悬剂 ()

A.硬脂酸钠

B.海藻酸钠

C.羧甲基纤维素钠

D.硅皂土

E.西黄蓍胶

答案:

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变大;不变题目分析: (1)当P向左移动时,滑动变阻器接入电路的阻值变小,电路总电阻R变小,电源电压U不变,由I=可知电路电流变大,电流表示数变大.(2)由电路图知,电流表测电路电流,电压表测电阻R1两端电...

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In the spring and summer months, thunderstorms(雷雨) are common. _____小题1:____. In thunderstorms, lighting can strike(击中) people and buildings and is very dangerous.

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Do not go under a tree because the lighting could hit the tree and travel through the tree to hit you.

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F. Since they happen often, some people don’t take them seriously.

G. Go into a nearby building or car right away.

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题型:单项选择题 案例分析题

税务稽查局张悦与李雪2009年5月12日,到方圆公司开展税务检查,获取如下资料:

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