皮皮学，免费搜题
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【判断题】
行驶系一般由承载式车身、前后车桥、车轮和前后悬架组成。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】真空中有一根半径为r的无限长直圆柱形导线，其轴线OO'沿铅垂方向．沿轴线方向通有电流I，电流均匀分布于横截面内，在距轴线3r处有一个电荷量为-e的电子，沿平行于OO'轴方向以速度v向下运动，如图所示．求电子所受的磁场力．
【单选题】More and more shops use the paper bags to take the place of the ones.
A.
plastic
B.
metal
C.
cloth
D.
glass
【简答题】Online shopping is becoming more
and more popular for a number of reasons; prices are often lower online and
you don’t have to queue up in busy shops.
【简答题】Online shopping is becoming more and more popular for a number of reasons; prices are often lower online and you don’t have to queue up in busy shops.
【单选题】With Christmas ______, more and more people come to shops to buy gifts.
A.
arranging
B.
appointing
C.
approaching
D.
applying
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