根据我国现行的法律，没有取得对外贸易经营权的企业、单位不得进出口货物，因此我国海关不

培养基模拟灌装试验通常应当按照（）每班次半年进行1次，每次至少一批。

漏出液中蛋白质含量一般小于（）。

A.10g／L

B.15g／L

C.20g／L

D.25g／L

E.50g／L

用钼酸铵分光光度法测定车间空气中五氧化二磷时，五氧化二磷与水生成偏磷酸，加热生成磷酸，如不加热结果偏高。

Directions: You got sick just two weeks before the final examination and were sent to hospital. One doctor treated you very well and you recovered soon. Write a letter of appreciation to the doctor (Ms. Green).

You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. Do not write the address. (10 points)

国际商会第500号出版物称为（）。

A.《国际贸易条件解释通则》

B.《托收统一规则》

C.《跟单信用证统一惯例》