用关系从句合并句子。 A.This school is only for some children. B. Their first language is not English. → This school is only for children ______ first language is not English.
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用关系从句合并句子。 A.We often go to visit our friends in Guangzhou. B.It is not far away from Shunde. → We often go to visit our friends in Guangzhou, ___________.
用关系从句合并句子。 A.Laura couldn't come to the party. B.This was a pity. →Laura couldn't come to the party,_________.
用关系从句合并句子。 A. Alex has passed the exam. B.This is good news.→ Alex has passed the exam, __________.
TLC鉴别时,可供鉴别的参数有( )
A. 比移值
B. 斑点颜色
C. 化学位移
D. 保留时间
E. 斑点大小