Ŀ
һλͬѧѡ03V̵ĵѹѹһͬѧȴΪ12VʵϲõĵѹӦ
A. 24V B. 2.4V C. 0.24V D. 1.2V
ƾܶΪ0.8103ǧ/3䵥λ һֻʢΪ0.2ǧ˵ˮһ ѡܡܡʢΪ0.2ǧ˵ľƾô˱ʢŨˮˮһ 0.2ǧˣѡڡڡ СڡѾƾˮˮ
ڵӽĿǾῴ˹Ȧıݣͨѹ˹硣ڱʱ롰˹Ȧ֮ųĵԴˣΪ岻Σԭ
A. ˹ȦĵѹܵͣС
B. ߴķǾԵģû
C. ĵС˹Ȧĵ嵼
D. ߴķкܶ˿ӷ
ҹʵʩġ䡱УȻ͵ȱԴĶȻúȣѧǶȷͻŵ___________ӻǶȷͻŵ________ȻúֱֵΪ21.14108J/kg3107J/kg
һ֡ؿءʱԶպϣʱԶϿһ֡ؿءʱԶպϣʱԶϿáؿء͡ؿءƾ¥¥ƿԽԼ磬Ҫư첻ں¥߶ʱƻԶͼʾĵ·ͼк
A. B. C. D.
СУ˻ϻһ齱ƣ֪齱ǷΪͭƳɣƽֱýƵΪ14g2cm3˽ƵܶǶ٣ǷΪͭƳɣͨ˵ͭ=8.9103kg/m3
ϣסҡλͬѧаܣǵijɼ±ʾõһ_____ ͬѧȽϷ __________________
õ綯гСѧ;СáãIJǣ
A. 綯гϵλ B. ·Եľ
C. ӭ D. Ա߳Խ
һҺ߶ȺٶȲͨҺϵķߴʾҺ߶Ⱥ½ٶȣͼʾ·ͼ֪˵ȷ
A. Һ½Sƶ B. ҺSƶ
C. ˹ķ䶨 D. Һ½ٶΪ1m/sSƶٶΪ4m/s