根据WHO1997年肺癌分期,N2为()。
A.同侧肺门淋巴结转移
B.对侧肺门淋巴结转移
C.同侧纵隔和隆突淋巴结转移
D.对侧纵隔淋巴结转移
E.同侧斜角肌淋巴结转移
参考答案:C
—You didn’t wait for Mr. Black last night, did you?
—No, but we ____. He didn’t return home at all.
A.couldn’t have
B.needn’t have
C.didn’t need to
D.should wait have
根据劳动者的心理特点,疲劳可以理解为()
A.疲乏
B.过度
C.周期
D.效应