GK阀止回阀弹簧的自由高为（）。
A.34.5～35.5mm
B.41～45mm
C.31.5～34mm
D.65～68.5mm
参考答案：B
_____ from what he did, he isn't a person to depend on. [ ]
A. Judge
B. Judging
C. Judged
D. Judges
造纸术传到日本是在中国的什么时候？
