题型:判断题 在一个恒容密闭容器中充入11gX气体(摩尔质量为44g·mol-1),压强为1×105pa。如果保持温度不变,继续充入X气体,使容器内压强达到5×105pa。则此时容器内的气体X的分子数约为[ ]A.3.3×1025 B.3.3×1024 C.7.5×1023 D.7.5×1022 查看答案
题型:判断题 —Lucy hardly goes back to see her parents, _____________?—__________. Instead, she chooses to write to them.A.doesn’t she; No B.does she; YesC.doesn’t she; YesD.does she; No 查看答案