在我国,咯血的主要原因首推()
A.肺梗死
B.肺结核
C.肺炎
D.矽肺
E.恶性肿瘤转移
参考答案:B
What did he do a. He telephoned me. b. He picked up the phone. c. He put the receiver down. d. He put my hanger up.
软件开发生命周期不包括的阶段是______。
A.概念阶段 B.调整阶段 C.测试阶段 D.部署阶段