婴儿期白细胞总数维持在
A.15X10 9/L
B.<5X 10 9/L
C.10x 10 9/L
D.5X 10 9/L
E.>20x 10 9/L
参考答案:C
—What _____ in the pencil-box?
—_____ a pencil and a rubber. [ ]
A. are; They're
B. are; There're
C. is; There're
D. is; There's
扁桃体术后1周左右,发生出血的常见原因有()
A.假膜脱落
B.血小板低
C.创面感染
D.年龄小
E.出院过早