Liao Fan, a Chinese actor, finally got to know     real success tastes like when he won the prize for Best Actor at the 64th Berlin film festival．

A．when

B．how

C．what

D．where

下面列出了几组物质，请将物质的合适组号填写在空格上。互为同位素的是  ，互为同分异构体的是   。

①金刚石与“足球烯”C₆₀；    ②D₂O与T₂O；       ③和

④CH₄和CH₃CH₂CH₃；        ⑤葡萄糖与果糖；   ⑥¹⁶O和¹⁸O