代办股份转让服务业务，从基本特征看，可以在证券交易所挂牌，也可以通过证券公司进行买卖。( )
参考答案：错
系统性红斑狼疮的最可能病因是
A．遗传因素B．环境因素如日光、感染等C．某些药物D．性激素E．以上均是
The table _______ 15 by 30 feet, and I have to find another one which may be smaller but _______longer
A．measure; last
B．is measured; lasts
C．measures; last
D．measures; lasts
