患者男性，52岁，每晨5时左右胸骨后疼痛，查体：心脏不大，无杂音。发作时心电图示Ⅱ，Ⅲ，aVF导联ST抬高，约30min后恢复正常。其诊断最可能是

A．冠心病心肌梗死

B．中间综合征

C．稳定型心绞痛

D．卧位型心绞痛

E．变异型心绞痛

Which of the following statements about the experiment mentioned in the passage is true

A．Only the twins are defected.

B．Most of the babies are delivered by means of Caesarean.

C．There are some troubles during all mothers' pregnancies.

D．One baby appears to be abnormal.