题干

阅读对话,判断下列句子的正(正确)误(错误)

A: Hello, Tom! This is Ms Smart. She's our new teacher.

B: Hello, Ms Smart.

C: Hello,Tom. Are you shy?

B: No, I am not. I am  very clever.

C: Ha, ha. Who's shy in your class?

B: Xiaoyong is a bit shy.

C: Who's naughty?

B: Parrot is very naughty.

C: You are very cute.

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同类题4

下表是某同学为验证酶的专一性而设计的实验方案,a~d表示4支试管,①~⑦表示实验步骤。对该实验方案的有关评价,错误的是(    )
 
a
b
c
d

淀粉溶液
2ml
蔗糖溶液
2ml
唾液淀粉酶溶液2ml
唾液淀粉
酶溶液2ml

37℃温水中水浴加热10min

将c倒入a,将d倒入b

37℃温水中水浴加热10min

加入现配的斐林试剂溶液2ml

37℃恒温水浴2min

观察并记录颜色变化