股票和债券是直接投资工具,筹集的资金主要投向有价证券。()
我国错畸形的遗传因素约占错畸形病因的() ["40%","29.4%","25%","91.20%","48.87%"]
合成胆固醇的限速酶是() ["羟甲基戊二酰辅酶A还原酶(HMGCoA还原酶)","脂蛋白脂肪酶","肝脂酶","卵磷脂胆固醇酰基转移酶","鲨烯环氧酶"]
额窦炎向前壁扩散可形成()。 ["下呼吸道感染","脑脓肿","海绵窦血栓性静脉炎","硬脑膜外脓肿","硬脑膜外脓肿"]
收益公司债券必须按期支付利息。()
乙状结肠扭转钡剂灌肠的典型X线特征是()克罗恩病钡剂灌肠的典型X线特征是()溃疡性结肠炎钡剂灌肠的典型X线特征是()