在体内可转变生成胆色素的原料的是()
A.胆固醇
B.胆汁
C.胆绿素
D.血红素
E.胆素
参考答案:D
看图写答句。
1.-What is Christmas?
-Christmas is a s____ h____.
2.-What is Lynn going to do?
-She's g____ t____ o____ her gift.
3.-What is Li Ming doing ?
-He's g____ a g____ to them.
4.-What are they putting on the Christmas tree ?
-They're putting on the l____.
5.-What's this?
-It’s a g ____.M____ Christmas!
像鸟一样在天空翱翔,是人类长期的梦想。在20世纪初,首次将人类的梦想变为现实的历史人物是:
A.卡尔·本茨
B.莱特兄弟
C.史蒂芬孙
D.富尔顿