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【单选题】
蓄电池的容量Q=It，式中（）A.
I是充电电流，t是充电时间
B.
I是放电电流，t是充电时间
C.
I是充电电流，t是放电时间
D.
I是放电电流，t是放电时间
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皮皮学刷刷变学霸
举一反三
【单选题】小明在探究杠杆平衡条件时,实验中杠杆始终处于水平平衡状态,如图,若在右端从1位置→2位置逐渐改变弹簧测力计拉力的方向,则拉力的变化情况是( )
A.
逐渐变大
B.
逐渐变小
C.
先变小后变大
D.
先变大后变小
【简答题】插销的零件图创建
【单选题】Suppose the U.S. dollar substantially depreciates against the Japanese yen. The change in exchange rate?
A.
can have significant economic consequences for U.S. firms.
B.
can have significant economic consequences for Japanese firms.
C.
can have significant economic consequences for both U.S. and Japanese firms.
D.
none of the above
【单选题】At a business dinner, when is it appropriate to have a drink?
A.
Never.
B.
Only if the host and senior guests are drinking.
C.
Only if others of your level and above are drinking.
D.
Always, this is an adult meal at a restaurant, after all.
【单选题】Suppose the U.S. offered a tax credit for firms that built new factories in the U.S. Then
A.
the demand for loanable funds would shift rightward, initially creating a surplus of loanable funds at the original interest rate.
B.
the demand for loanable funds would shift rightward, initially creating a shortage of loanable funds at the original interest rate.
C.
the supply of loanable funds would shift rightward, initially creating a surplus of loanable funds at the original interest rate.
D.
the supply of loanable funds would shift rightward, initially creating a shortage of loanable funds at the original interest rate.
【简答题】在探究“杠杆的平衡条件”实验中: (1)首先,调节杠杆两端的 ,使杠杆两端在不挂钩码时,保持水平并静止,这样便于 。 (2)如图所示,杠杆每格长度相同,杠杆的口处已挂着2个0.5N的钩码,要使杠杆平衡,则应在杠杆的 处,挂上 个0.5N的钩码。
【简答题】按照机器人的技术发展水平可以将工业机器人分为三代, 分别是 、 和 。
【简答题】项目可行性市场调研。请各组上传期中考核的PPT或VCR
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