下面哪台设备中没有冷凝下来的气体称为尾气（）
A、尾气冷凝器
B、全凝器
C、成品冷凝器
D、高沸塔
参考答案：A
产品包装，尤其是产品商业包装在销售物流过程中将要起到便于保护、便于仓储、便于运输、便于装卸搬运的作用。
When caring for children who are sick, who have sustained traumas, or who are suffering from nutritional inadequacies, the nurse should know the correct hemoglobin (Hb) values for children. Which of the following ranges would be inaccurate（）
A. Neonates. 10.6 to 16.5.
B. 3 months. 10.6 to 16.5.
C. 3 years. 9.4 to 15.5.
D. 10 years. 10.7 to 15.5.
