植物细胞与动物细胞共同具有的结构是__________、__________和___________。
细胞膜 细胞质 细胞核
We are using so many raw materials every day, which _______ that they _______.
A．are running out ; will be used up
B．are being run out; will run out
C．have run out of ; will be using up
D．have run out; will run out of
幕墙主柱、横梁体系对温度作用的构造处理措施。
