单项选择题
室内消火栓口距地面安装高度宜为____,其出水方向宜向下或与设置消火栓的墙面成____角。( )A.1.1m...
单项选择题室内消火栓口距地面安装高度宜为____,其出水方向宜向下或与设置消火栓的墙面成____角。( )
Which of the following modes of transport is suitable f...
单项选择题Which of the following modes of transport is suitable for deliver small amount of goods to customer’s home address? ( ) A、Inland waterway transport B、Railroad transport C、Air transport D、Parcel post transport
下列物质中,主要在回肠被吸收的是( )。A.Fe2+B.胆固醇C.维生素B12D.Ca2+
单项选择题下列物质中,主要在回肠被吸收的是( )。