155. In Beijing volunteers are making use of every minute to ______ their foreign languages because volunteers must pass a written test and an interview.

A．polish up

B．take up

C．put up

D．make up

消痔灵四步注射法，下列哪一项是不正确的：

A．痔上动脉区注射
B．痔上粘膜下层注射
C．洞状静脉区注射
D．痔区粘膜下层注射
E．痔区粘膜固有层注射