涡轮工作叶片前缘和后缘较薄,中间较厚的是:().
A.反力式涡轮叶片
B.冲击式涡轮叶片
C.冲击-反力式
D.自由涡轮叶片
参考答案:B
关于月经的临床表现,错误的是
A.月经周期是从上次月经来潮的第1天到下次月经第1天计算
B.一般一次月经出血量约80~100ml
C.经血一般不凝,月经血内缺乏纤维蛋白和纤维蛋白原
D.月经周期一般为28~30天
E.经血含有子宫内膜碎片,宫颈粘液及脱落的 * * 细胞
Our national football team had to _____ the fact that we missed the championship only by one goal.
A.come up with
B.come up to
C.come out with
D.come to terms with