某男,28岁,排便时肛门滴血,有痔核脱出,便后自行回纳。属哪一种痔()
A.一期内痔
B.二期内痔
C.三期内痔
D.嵌顿性内痔
E.血栓性外痔
参考答案:B
I think _________ necessary for students to take an interest in all subjects.
A.that
B.this
C.it
D.one
中国期货保证金监控中心对期货公司执行投资者适当性制度的情况进行核查验证。( )