题目内容

7.关于香豆素异羟肟酸铁反应说法正确的是( )。

A. 酸性条件下反应
B. 碱性条件下反应
C. 针对是其内酯结构的反应
D. 阳性结果呈红色
E. 极性较大

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Complete the sentences. Circle the correct number or word.1.( 15/50 ) percent of the people in Queens are from another country.

A. 15
B. 50

Complete the sentences. Circle the correct number or word.2.These people come from ( 100/200 ) different nations.

A. 100
B. 200

Complete the sentences. Circle the correct number or word.3.They speak almost ( 50/150 ) different languages.

A. 50
B. 150

Complete the sentences. Circle the correct number or word.4.For now, Queens is the most diverse place in the ( U.S./world ).

A. U.S.
B. world

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