两种商品在（）方面有某种共同点，消费者就会产生错觉。
A.材料
B.质量
C.用途
D.交易
参考答案：A, B, C, D
24．—How do you think I can make up with Jack?
—Set aside you disagree and try to find you have in common.
A．what , what
B．what, that
C．where, whether
D．where, what
在生物工程、药物等领域，美国、欧盟和日本拥有（）左右的专利。
A.70%
B.86%
C.80%
D.95%
