二氧化碳是一种不助燃、不导电、无腐蚀性的惰性气体，不空气重.
参考答案：对
My mother will go to the supermarket as soon as she writing the letter. [ ]
A. finishes
B. finished
C. will finish
D. was finishing
治梅核气、结胸证多用
A．天南星B．桔梗C．旋覆花D．半夏E．白芥子
