下列一元二次方程无解的是[ ]
A.x2-2x+1=0
B.x2+3x-2=0
C.2x2+x+3=0
D.2x2-3x-1=0
答案:C
——I have a sore thoat.
——________.
A.You should go to bed
B.That’s a good idea
C.Drink some hot tea with honey
D.No problem
某女,38岁。白带绵绵,清稀量多,伴心烦心悸,失眠,便溏,舌淡苔白,脉沉细。宜首选
A.金樱子、诃子
B.肉豆蔻、白果
C.山茱萸、五味子
D.海螵蛸、桑螵蛸
E.莲子、芡实