正方形由水平和竖直方向的直线构成，有______的视觉效果。
A．正直稳重
B．扩大
C．优美
D．平整
参考答案：A
Housing prices in Beijing and Shanghai are now largely ________ for lowincome families.
A．out of control
B．out of touch
C．out of reach
D．out of order
双切剪剪切的最大带钢厚度为（）。
A、0.80mm
B、0.50mm
C、0.10mm
D、0.08mm
