根据句意及汉语提示完成单词，使句意完整、正确。

1. Simon and Jack are old enough to look after _____ (自己). Don't worry.

2. What's the _____ (身高) of Yao Ming? Do you know?

3. The teacher was happy because the boy answered all the questions _____ (正确).

4. What an _____ (令人惊奇的) result! I can't believe my ears.

5. There is little time left. Why not _____ (开车) me to school, dad?

2，3位无双键，3位没有羟基的黄酮类化合物是（）

A.黄酮醇

B.二氢黄酮

C.二氢黄酮醇

D.异黄酮

E.查耳酮