【单选题】After careful examination the doctor______ the illness of the child as pneumonia.
【单选题】如图所示,已知 A 点的坐标( 5,20,25 ), B 点的坐标( 10,10,15 ),则 A 点在 B 点的( )。
【单选题】高温下,炽热的铁与水蒸气在一可变容积的密闭容器中进行如下反应:3Fe(s)+4H20(g)=Fe3O4(s)+4H2(g),下列条件的改变对上述反应速率影响最小的是()。
【单选题】高温下,炽热的铁与水蒸气在一个体积可变的密闭容器中进行反应:3Fe(s)+4H 2 O(g)═Fe 3 O 4 (s)+4H 2 (g),下列条件的改变对其反应速率几乎无影响的是( )
【单选题】It was after careful consideration we decided to take action.
【单选题】After careful investigation we find that one of the statement has ____ to be untrue.