“化学为生命密码解锁”，“DNA”承载着生命遗传的密码，胞嘧啶（C4H5ON3）是DNA水解产物之一．（1）胞嘧啶中碳、氢、氧、氮四中元素的质量比为____（2）____g胞嘧啶中含32g氧元素？
若空间三条直线a,b,c满足a⊥b，b∥c，则直线a与c（ ）.
①Do you like the red hat? ____ A. He is under the tree.
②Where's the old man? ____ B. No, they aren't.
③How is the lion? ____ C. No, I don't.
④Are they tigers? ____ D. Yes, it is.
⑤Is this a kite?____ E. It is very strong.
