向相机装入存储卡必须在（）的状态下进行。
A.回放中
B.开机
C.关机
D.拍摄中
参考答案：C
Mr．Green didn’t understand ________ made his daughter so absent-minded this morning．
A．how that was
B．what was it
C．why it was that
D．what it was that
浸润麻醉适用于（）
A.唇部手术
B.舌部手术
C.腭部手术
D.牙及牙槽突手术
E.颊部手术
