便血的疾病有
A．内痔
B．直肠癌
C．肛裂
D．息肉痔
E．肛隐窝炎
参考答案：A,B,C,D
How much one enjoys himself travelling depends largely on ________ he goes with, whether his friends
or relatives.[ ]
A. what
B. who
C. how
D. why
双丝光棉的主要成份是（）。
A、天丝
B、棉
C、绢丝
D、亮丝
