甲、已两物体的质量之比为5:2,密度之比为4:3,则体积之比为______.
V甲V乙=m甲ρ甲m乙ρ乙=5423=158.
故答案为:15:8.
患儿男,12岁,因“反复发热1周”来诊。隔日高热1次,发热前有寒战,热退汗多,热退后精神可。发病前曾在安徽度暑假。查体:面色略苍白;肝、脾轻度大伴压痛。实验室检查:血常规:Hb98g/L,RBC3.2×10/L,WBC6.0×10/L,N0.60;ALT96U/L。
抗生素治疗应采用()
A.头孢曲松
B.阿昔洛韦
C.磷酸氯喹+伯氨喹
D.吡喹酮
E.青霉素
— I hear that Tom can’t afford his schooling this fall.
— _____, let’s do something for him.
A.If any
B.When necessary
C.When possible
D.If so