大部分舌尖淋巴管汇入至（）
A.同侧颌下淋巴结
B.舌下淋巴结
C.颏下淋巴结
D.颈深上淋巴结
E.对侧颌下淋巴结
参考答案：C
吸收比是绝缘电阻表在额定转速下60s的绝缘电阻读数和（）的绝缘电阻读数之比。
A.60s
B.45s
C.30s
D.15s
—Would you like some milk?
—_____.[ ]
A. Yes, it is
B. No, I wouldn't
C. Yes, please
D. Yes, I would
