题目

 Some economists predict that the dollar will remain weak       economies abroad are expected to grow faster than that of the United States. A. as                                B. unless                    C. before                          D. until 答案：A我国土地资源对农业发展有利的方面是 [     ]A．土地资源类型多样B．人均耕地少C．各类土地资源分布不均D．山地多，平地少