制作叶片横切面的临时切片，放到显微镜下观察，如果观察到的表皮细胞上有气孔，则最有可能是_____表皮。
下
___ people food, jobs, housing, justice, compassion and equality is what a government should first consider after a natural disaster strikes．
A．Offered
B．Being offered
C．Offer
D．Offering
什么是自动作用伐？通常有哪几种？
