【单选题】电源的电动势为3V,内电阻为0.3欧姆,当外电路断路时,电路中的电流和端电压分别是( )
【单选题】电源的电动势为3V,内阻为0.3Ω,当外电路断路时,电路中的电流和端电压分别是:
【简答题】A.spread B.steady C.steal D.threaten
【单选题】The developing countries threaten to block further liberalization because they ______.
A.
are now conspiring to keep their markets closed
B.
want their problems and complaints to be dealt with first
C.
cannot afford to deliver benefits in agriculture and textile
D.
want no obligations in intellectual property and anti-dumping
【单选题】我校李明同学全家月收入5000元左右,除生活消费外,尚有部分积蓄,他的父母想把节余的钱用来投资。你认为他们在选择投资时应注意的问题有()。
【单选题】电源电动势为3V,内电阻为0.3Ω,当外电路断电时,电路中的电流和电源端电压分为( )。