【单选题】下列属于幼儿成长最自然的生态环境是( )。
【单选题】为使碳素工具钢具有高硬度和高耐磨性,所以碳素工具钢都是()。
【单选题】冷作工使用的工具如划针、錾子、90°角尺等,都是用()钢制作成的。
【单选题】一类环境中,C30钢筋混凝土梁的保护层厚度最小取()
【单选题】What does the metaphor that "English is a like a tree with a trunk and some branches while Chinese sentence is like a clump of bamboo" show about the differences in English and Chinese languages?
A.
The differences of stress-beginning sentence and stress-ending sentence.
B.
The differences of hypotaxis and parataxis.
C.
The differences of passive voice and active voice.
D.
The differences of linear and spiral discourse.
【多选题】下列有关保护层的描述,错误的是()。
C.
一类环境(一般地上环境)钢筋混凝土梁纵向受力钢筋外表面到梁表面的最小距离为保护层厚度
D.
按规范规定,二a类环境(一般地下环境),混凝土强度等级为C25的钢筋混凝土梁,其钢筋保护层厚度可以取25mm
【简答题】Like the trunk of a tree, it rose in the air, branching out as it climbed. (para, 12)