When preparing to give a child with insulin-dependent diabetes his dose of regular and NPH humulin insulin, which of the following actions would be most appropriate（）

A. Taking the premixed insulin out of the refrigerator, then withdrawing the amount into in one syringe.

B. Using two syringes, one for each type of insulin, and giving two injections.

C. Withdrawing the NPH insulin first, then withdrawing the regular insulin into one syringe.

D. Withdrawing the regular insulin first, then withdrawing the NPH insulin into one syringe.

西方列强曾经强迫中国签订不平等条约，取得了许多权益，其中对中国民族工业发展危害最大的是（）

A、开埠通商

B、协定关税

C、割占土地

D、赔偿银两