在温度不变时,一定质量的气体,压强越大,体积 ______ ,压强越小,体积 ______ .
越小;越大
已知x=1是方程x2+bx-2=0的一个根,则b的值是______;方程的另一个根是______.
I like comedies _______ I don't like documentaries at all; they're more than boring. [ ]
A. and
B. but
C. or
D. for