早期胃癌的概念是直径在2cm以内,无淋巴结转移。
参考答案:错
Now____ nationwide campaign has been launched in China to encourage people to adopt ____ low carbon
lifestyle. [ ]
A. a: the
B. a; a
C. the; the
D. the; a
纳米材料表明效应是指随纳米微粒粒径的减小,比表面积急剧(),位于表面原子数占全部原子数的比例(),同时表面能也迅速()的现象。