题目

 In the wartime, the masses devoted whatever they had to ______ the army in fighting against the Japanese.   A. have supported   B. support  C. having supported  D. supporting 答案:A下列图示与对应的叙述相符的是A.由图1所示曲线可知,化学催化比酶催化的效果好B.在H2S溶液导电性实验中,由图2所示曲线可确定通入的气体X为Cl2C.在其它条件不变时,2SO2(g)+ O2(g)2SO3(g)转化关系(图3)中,纵坐标表示O2的转化率D.图4是用0.l000 mol·L-1的盐酸滴定20.00 mL 0.l000mol·L-1 Na2CO3溶液的曲线,从a→b点反应的离子方程式为:HCO3-+H+ = CO2↑+H2O
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