急性肢体缺血的临床表现包括（）
A.急性疼痛
B.瘫痪
C.感觉异常
D.皮肤苍白
E.肢体远端无脉搏
参考答案：A, B, C, D, E
—Are these your erasers?
—_____. [ ]
A. No, these aren't
B. No, they aren't
C. No, these are
D. No, they are
Your sister works very hard ,and .
A．so you are
B．so you do
C．so are you
D．so do you
