对急性心肌梗死的诊断最有意义的检查是:()
A.心电图的病理性Q波
B.心电图表现ST段上抬
C.肌钙蛋白增高(定量测定)
D.CK增高
E.CK-MB增高
参考答案:C
John Lennon and Paul _______ the main songwriters of the Beatles in 1960s. [ ]
A. are
B. is
C. was
D. were
找出下列单词中的可数名词:
hamburger, tomato, broccoli, orange, ice cream, salad, banana, strawerry, pear
___________ ______________ ___________ __________ _______ __________