诊断用X线机房的主防护铅当量厚度应是（）
A.0.5mm
B.1.0mm
C.1.5mm
D.2.0mm
E.2.5mm
参考答案：D
32. Despite what I’d been told about the native people’s attitude towards strangers, ______ did I come across any rudeness.
A．in no time
B．at no time
C．in any time
D．at any time
汉防己除祛风除湿、止痛外，又能（）
A．降血压
B．杀虫解毒
C．强筋健骨
D．利水消肿
E．定惊止痉
___ did I come across any rudeness.