It is usually warm in my hometown in March, but it ______ be rather cold sometimes.
A:must
B:can
C:should
D:would
James plays _____ Miami Heat. He is going to play _______ the players in the Houston Rockets.
吸气时,血液中的二氧化碳能透过毛细血管壁和肺泡壁进入肺泡的原因是( )
人体健康离不开化学,下列说法正确的是( )
若不等式组 1+x<a3-x⩽0有解,则实数a的取值范围是( )