地球上经度相同的地方,则( )
A:季节相同
B:正午太阳高度相同
C:昼夜长短相同
D:地方时相同
By the time he leaves university, he ______ some working experience from his part-time job.
如图所示,若用电流表测并联电路中通过灯L2的电流大小,则线头M应接在“____ ”处;若用电流表测通过两盏灯的总电流大小,则线头M应接在“____ ”处。(填“+”或“一”)