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【多选题】
( )的说法是正确的。A.
在电场中，两点间电位的差值叫电位差，也叫电压
B.
电压的方向：规定电压方向，即从低电位指向高电位
C.
电荷在导体中有规则的定向运动叫电流
D.
电流在数值上等于单位时间(秒)内通过导体截面积的电荷量
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参考解析：
知识点：
皮皮学刷刷变学霸
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【多选题】机器人的安全使用环境不包括( )
A.
燃烧的环境
B.
有爆炸可能的环境
C.
无线电干扰的环境
D.
水中或其他液体中
E.
运送人或其他动物的环境
F.
攀爬在机器人上面或悬垂在机器人之下
G.
有光照的环境
【简答题】What's the POST for ?A. The PC peforms a power-on self-test
(POST) . B. The POST is a small computer program
within the BIOS that checks for hardware failures. C. A single beep after the POST signals ...
【简答题】Complete the following dialogue by translating Chinese into English orally. A: Where have you been? B: I have been to the computer component store. What's up? A: I want to upgrade my computer by chang...
【单选题】What's the component of the underlined part in the following sentence? Even though the children pretended to be asleep , the nurses were not deceived when they came into the room.
A.
subject
B.
object
C.
predicative
D.
attribute
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