()通常,在合金中起强化相的作用。
A.机械混合物
B.金属化合物
C.纯金属
D.固溶体
参考答案:B
How manystudents in your school have been ___ to famousuniversities this year? [ ]
A. entered
B. accepted
C. received
D. admitted
心肌梗死症状中最先出现下列哪一项()
A.发热
B.疼痛
C.恶心、呕吐
D.呼吸困难
E.昏厥