—No, he ____(try)to, but failed.
关于具有绿色荧光蛋白基因的小鼠,下列说法正确的是( )
A. Enjoy your meal!
B. And to drink?
C. Can I help you?
D. How much is it?
E. Here you are.
A:____
B:I want some rice.
B:A box of milk for me,please.
A:That's some rice and a box of milk.
B:____
A:It's ten dollars.
A:Thank you. ____
已知下列热化学方程式:2H2(g)+O2(g)===2H2O(g) △H=-483.6 kJ·mol-1 H2(g)+12O2(g)===2H2O(g)△H=-241.8 2H2(g)+O2(g)===2H2O(g) △H=-571.6 则氢气的燃烧热是( )
相遇青春,我们心中开始萌发一些对异性朦胧的情感。这是青春成长中的不正常现象。( )