塞尺的厚度一般为（）.
A.0.02~1.00mm
B.0.05~1.00mm
C.0.01~0.05mm
参考答案：A
_____ hard you may try, you can't possibly persuade Tom to give up smoking, for he is so addicted to it.[ ]
A. Whatever
B. However
C. Whichever
D. Whenever
胸膜依其所在部位可分为（）、（）、（）和（）4部分。
