（）由于其采用泥浆护壁成孔，故成孔时噪声低，适于城区施工，在地铁基坑和高层建筑深基坑施工中得到广泛应用。 ["正反循环钻机","螺旋钻机","冲击式钻机","压板钻机"]
议价市场、店头市场和第四市场，都是需要经纪人的市场。
证券信用评级的功能是（） ["降低信用投资风险","降低信用评级筹资成本","有利于规范交易与管理","能够提供借贷行为风险程度的信息"]
Which two components are unique to controller-based wireless installations？ （） [" Mobility Services Engine"," WLAN controller"," Cisco Wireless Control System"," rugged\/exterior access points"," interior access point"]
什么是商业银行的表外业务？有哪些主要的种类？
人格形成的影响因素
