They often _____ in Chinese in the English class. [ ]
A. tell
B. talk
C. speak
D. say
B
在25℃、101kPa下,1g甲醇燃烧生成CO2和液态水时放热22.68kJ,下列热化学方程式正确的是[ ]
A.CH3OH(l)+3/2O2(g)== CO2(g)+2H2O(l) △H=+725.8 kJ/mol
B.2CH3OH(l)+3O2(g)== 2CO2(g)+4H2O(l) △H=-1452 kJ/mol
C.2CH3OH(l)+3O2(g)== 2CO2(g)+4H2O(l) △H=-725.8 kJ/mol
D.2CH3OH(l)+3O2(g)== 2CO2(g)+4H2O(l) △H=+1452 kJ/mol
证见喉间起白如腐,不易拭去,咽喉肿痛,鼻干唇燥,脉数者,宜选用()
A.麦冬汤
B.玉液汤
C.养阴清肺汤
D.沙参麦冬汤
E.琼玉膏