商品编码的基本原则主要有（）。
A、独立性原则
B、兼容性原则
C、合理性原则
D、条理性原则
参考答案：C
The number of people present at the meeting ________ about 1000, a large number of whom ________ experts from abroad.
A．was; was
B．were; were
C．was; were
D．were; was
凡士林功用。
