常用的粒子径的测定方法有()、()、沉降法、比表面积法、筛分法等。
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A chart projection depicting the poles and a small area on either side of a connecting meridian,that is sometimes used for star charts,is the().
A. azimuthal gnomonic projection
B. Lambert conformal projection
C. transverse Mercator projection
D. polyconic projectio
发明人或者设计人有权在专利文件中写明自己是发明人或者设计人。
A. 正确
B. 错误