黑热病病原学检查中,涂片检查常取材于()
A.骨髓
B.脾
C.淋巴结
D.外周血
E.肝组织
参考答案:A, B, C
下列过程属于物理变化的是[ ]
A.煤的干馏
B.煤的气化
C.石油分馏
D.石油裂化
—Is there _____ wrong with me, doctor?
—I'm afraid so. Your heart is beating a bit too slow. [ ]
A.something
B.anything
C.everything
D.nothing