鼠疫耶尔森菌的传播媒介是（）
A.鼠蚤
B.鼠虱
C.恙螨
D.蚊
E.蜱
参考答案：A
Zhao Benshan, whose overwork _______ his health failure last year, is said to perform in the coming Spring Festival Gala on CCTV.
A．submitted to
B．admitted to
C．contributed to
D．subscribed to
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