___, the car started.

A．The signal giving

B．The signal is given

C．The signal given

D．Having given the signal

患者，男，24岁。暴食后突然上腹剧痛，恶心，呕吐，发热。检查：腹部较软，上腹压痛，血清淀粉酶增高。其诊断是

A．急性胃肠炎
B．消化性溃疡急性穿孔
C．胆囊炎
D．急性胰腺炎
E．心肌梗死