红细胞变形能力差的是()
A.微血管病
B.糖尿病
C.缺铁性贫血时
D.高脂血症
E.高血压病
参考答案:B, D, E
若a+b=0,ab=11,则a2-ab+b2的值为( )
A.11
B.-11
C.-33
D.33
I think the room is too small for us _____. [ ]
A. to live
B. living in
C. to live in
D. live in