引起新生儿呕吐的外科疾病有()
A．肠闭锁
B．肠旋转不良
C．肥厚性幽门狭窄
D．食道闭锁
E．胃食道反流
参考答案：A, B, C, D
Great changes have taken place in that school. It is no longer _______ it was 20 years ago, _______ it was so poorly equipped.
A．that; which
B．what; when
C．what; which
D．which; that
依照我国专利法的规定，下列可以授予专利权的是______。
A．科学发现 B．智力活动的规则和方法C．疾病的诊断和治疗方法 D．新产品的设计生产方法
