问题详情

According to the passage, what is common to relational terms and deictic expressions？
A．They both require a considerable exercise of intelligence.
B．They both involve the concept of size in referring to objects.
C．They can both be used to test the intelligence of children.
D．They pose difficulties for young children in acquisition of language.请帮忙给出正确答案和分析，谢谢！