按公称压力分类，中压阀门的使用压力为PN=10。
参考答案：错
Water Knows Answers by a Japanese author, ________ into 16 languages, has become a best- seller all over the world.
A．having translated
B．to be translated
C．being translated
D．translated
不稳定性骨折是
A．嵌插性骨折
B．粉碎性骨折
C．斜形骨折
D．青肢骨折
E．螺旋性骨折
