问题
选择题
It’s not easy for the expert to ______ pig flu.in humans from regular human seasonal influenza.
A．distinguish
B．separate
C．identify
D．recognize
答案
答案：A
A考查动词词义辨析。句意：对专家来说不容易把人患的猪流感和普通流感区分开来。Distinguish---from把----与---分别开来；separate----from---把---与----分隔；identify辨别；recognize认出。