【简答题】The Second Industrial Revolution marked the transformation from ( ) production to ( ) production in the United States.
【简答题】the transformation from high-speed to high-quality development
【单选题】下列关于窝沟封闭的说法中错误的是( )
B.
窝沟封闭是不损伤牙体组织,将封闭材料涂布于牙齿咬合面、颊舌面的点隙裂沟的方法
C.
窝沟封闭对牙齿缝隙内、邻近牙龈边缘等地方也具有防龋作用
D.
牙齿的窝沟点隙深,特别是有可以插入或卡住探针的窝沟需要做窝沟封闭
【单选题】Paralleling the spread of democracy, since the 1980s there has been the transformation from:
A.
free-market economies to socialist economies.
B.
mixed economies to collectivist economies.
C.
open economies to closed economies.
D.
command economies to market-based economies.
【单选题】下列关于植草沟说法错误的是( )
A.
植草沟指种有植被的地表沟渠,可收集、输送和排放径流雨水,并具有一定的雨水净化作用
B.
植草沟适用于建筑与小区内道路,广场、停车场等不透水面的周边,城市道路及城市绿地等区域
C.
不可作为生物滞留设施、湿塘等低影响开发设施的预处理设施
D.
植草沟具有建设及维护费用低,易与景观结合的优点
【单选题】下列关于边沟说法错误的是()
B.
公路上土质边沟一般采用矩形截面,石质边沟一般采用梯形截面;
D.
边沟可采用浆砌片石、浆砌卵石和水泥混凝土预制块防护;
【简答题】Since ( ), the transformation of Chinese society, especially the transformation from planned economy to market economy system, has made great changes in the environmental factors for the operation ...
【单选题】霉菌和放线菌培养条件中,除了营养物质的区别外,最明显不同的是: