A pen is on the right of a ruler. The ruler is on the right of an eraser. That is to say, the ruler

题干

A pen is on the right of a ruler. The ruler is on the right of an eraser. That is to say, the ruler is ______ them.

A：in front of

B：across from

C：under

D：between

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D

将光敏电阻R和定值电阻R₀、电流表、电压表连成电路，接在9V的电源上，光敏电阻阻值随光强变化关系如表：（“光强”表示光强弱程度的物理量，符号为E，单位坎德拉（cd））

光强E/cd	1	2	3	4	5	6
光敏电阻R/Ω	18	9	6	4.5	3.6	3

若电流表的示数增大时，电压表的示数将____ （“增大”、“减小”或“不变”），电路消耗的总功率将____ （“增大”、“减小”或“不变”）．