将鼠标移到想要选择的物体上,当鼠标指针变成加号形状时,单击鼠标即可选择物体。如果要同时选择多个物体,可以按住______键,同时单击场景中的物体。
参考答案:Ctrl
You can hardly imagine what a difficult time the woman had ________ her children.[ ]
A. brought up
B. bringing up
C. to bring up
D. bring up
火邪具有的致病特点是( )。
A.易发肿疡B.多挟湿C.善行而数变D.易伤肺E.易伤阳气