当x=2-1,y=2+1时,
x2+y2=(2-1)2+(2+1)2=2-22+1+2+22+1=6.
故答案是:6.
结构游戏属于()。
A、教学游戏
B、创造性游戏
C、有规则游戏
D、自由游戏
The nurse is administering sublingual nitroglycerin (Nitrostat) to the client. Immediately afterward, the client may experience which of the following symptoms
A.Nervousness or paresthesia.
B.Throbbing headache or dizziness.
C.Drowsiness or blurred vision.
D.Tinnitus or diplopia.