已知直线a,b,平面α,β,且 a∥α,a∥β,α∩β=b,则 a与b( )
兰州牛肉面制作中通过添加蓬灰(主要成分K2CO3),使面条劲道有弹性.下列关于K2CO3的说法中不正确的是( )
The team will move a speed of 15 kilometers per hour, and have a short break every 2 hours. During the break they will tell stories_______ English.