下列地形区中,都位于我国北方地区的是 [ ]
A、黄土高原、内蒙古高原
B、华北平原、东北平原
C、东北平原、云贵高原
D、长江中下游平原、四川盆地
答案:B
对人体来说,一般情况下不高于36V的电压是安全的,通过人体的电流接近30MA时就会有生命危险,根据以上数据,请估算人体电阻最接近于( )
A.1×102Ω
B.1×103Ω
C.1×104Ω
D.1×105Ω
After a three-hour heated discussion, all the members in the jury reached the conclusions that the man was () of murder.
A.criminal
B.charged
C.guilty
D.faulty