A:brought, caused
B:bringing, causing
C:having brought, having caused
D:to bring, to cause
—Don't be late for school next time,______? —No,I won't.
一学生从洋葱鳞片叶上撕下一小块透明的表皮按课本的实验步骤制成玻片标本,这种玻片标本称为( )