A:in
B:on
C:at
D:to
如图为人体的部分生理活动示意图,①~⑦表示生理过程,Ⅰ、Ⅱ表示血管类型.请据图分析冋答问题:
如图所示的四个电路中,能够正确测量出电路中L1电流的是( )
Our headmaster isn't in his office. I can't find him anywhere. Did you notice him ______ the office?