B细胞淋巴瘤表达CD20的阳性率是()。
A.90%
B.60%
C.80%
D.70%
E.90%以上
参考答案:E
这是什么交通标志?
A、两侧变窄B、右侧变窄C、左侧变窄D、桥面变窄
I found him sitting in his chair,completely ____ a magazine.
A.absorbing
B.being absorbed in
C.absorbed in
D.absorbing in