限制价格,是政府为了限制某些生活必需品的价格涨价,而对这些产品所规定的最高价格。我国某生活必需品的需求曲线(D)和供给曲线(S)如图所示。该产品的限制价格和需求数量分别为(图中纵坐标P由上而下依次为P1、P0、P2;横坐标Q从左至右依次为Q1、Q2、Q0、Q3、Q4) A.P0、Q0 B.P1、Q2 C.P1、Q4 D.P2、Q3
—Can you tell me _____when the teacher came into the classroom? —Sorry,I don’t know.
The teacher said that _____ of the boys would take part in the fashion show.
—______ did your sister leave China? —She______ for three years .
—How are you getting on with your study,Tom? —So far,I____very well at school.
The smile to the teacher’s face showed she was_____with us.