-- Jim has been working hard all these days.
-- _____________ he passed the exam with ease.
A:No doubt
B:No wonder
C:No way
D:No means
“爆竹声中一岁除,春风送暖入屠苏”是北宋王安石的诗句,它隐含的科技发明是 ( )
把干燥的蓝色石蕊试纸放在CO2气体中,石蕊试纸不变色.将CO2气体通入滴有石蕊指示剂的水中,溶液变红色.再将该溶液敞口加热一段时间,发现溶液的红色褪去,冷却到原温度后,再次通入CO2,溶液又变红色.上述实验现象不能说明的是( )