相亲 b_______ d______
相亲 b_______ d______
情绪低落 v. d______
情绪低落 v. d______
d______=e-3xdx，d(x2·2x)=dx．
d______=e-3xdx，d(x2·2x)=dx．
阻止、制止（v）d______
阻止、制止（v）d______
d______ a place sb. is going to
d______ a place sb. is going to
Can you d______ this picture?
Can you d______ this picture?
It might seem more difficult to speak politely than d______ .
It might seem more difficult to speak politely than d______ .
中国大学MOOC: Flowers are often categorized d______ on their color.
中国大学MOOC: Flowers are often categorized d______ on their color.
靠不住的，容易使人上当的（Adj.）d______
靠不住的，容易使人上当的（Adj.）d______
早产儿、低出生体重儿、双胎儿生后____开始补充维生素D______，____后改预防量。足月儿生后2周开始补充维生素D______，至______。
早产儿、低出生体重儿、双胎儿生后____开始补充维生素D______，____后改预防量。足月儿生后2周开始补充维生素D______，至______。