患儿1岁半。发热4天,热退后全身出现红色斑丘疹。其诊断是
A.风疹
B.幼儿急疹
C.猩红热
D.麻疹
E.水痘
参考答案:B
图是两个电源的路端电压与电流的关系图线,由图线可知:
A.两电源电动势不等,且
B.两电源电动势相等
C.两电源内电阻不等,且
D.两电源内电阻相等
In relation to the law of partnership, describe the essentials of a partnership. (10 marks)