My daughter usually gets up at 6: 00 the morning, but Sunday morning she gels up at 8: 00.
下列句子没有语病的一项是( )
已知不等式组y-1≥0x+y-4≤0y-1≤kx-1(k>0)表示的平面区域为D,若∀(x,y)∈D,yx2≤1恒成立,则实数k的取值范围是____
London is a big city ______ the River Thames.