A:黄河入海流
B:锄禾日当午
C:大漠孤烟直
D:手可摘星辰
剧烈运动时,运动员表现为大汗淋漓,满脸通红,这体现了皮肤的( )
He _______ an English club last year and has improved his English a lot.
已知:①卤块主要成分为MgCl2·6H2O,含有MgSO4、FeCl2等杂质。
②四种化合物的溶解度(S)随温度(T)变化曲线如图所示。
What does Mike want to buy?