A:p∧q
B:¬p∧q
C:p∧¬q
D:¬p∧¬q
二氧化碳、尿素和多余的水等排出体外的过程叫排泄。(判断对错)
—The difficult maths problem has been solved by Tom at last.
— Indeed; and the ___ way Tom worked out the problem impressed the teacher deeply.
____与太阳能、风能以及潮汐能一起作为新能源的代表。
如图1所示的电路.滑动变阻器最大阻值为R0=58Ω,电源路端电压U随外电阻R变化的规律如图2所示,图中U=12V的直线为图线的渐近线,试求: