急性咽炎不具有的症状是()
A.咽部干燥感
B.咽部疼痛
C.耳部疼痛
D.四肢酸痛
E.张口困难
参考答案:E
阅读理解下列材料然后回答问题:
解方程:x2-3|x|+2=0
(1)当x≥0时,原方程化为x2-3x+2=0,解得:x1=2,x2=1
(2)当x<0时,原方程化为x2+3x+2=0,解得:x1=1,x2=-2.
∴原方程的根是x1=2,x2=1,x3=1,x4=-2.
请观察上述方程的求解过程,试解方程x2-|x|-2=0.
The white trousers look nice. He wants to_____.
A.try it on
B.try on them
C.try them on
D.try on