肾癌出现血尿时，说明肿瘤已发展到
A．穿破肾包膜
B．穿入肾盂肾盏
C．血行转移
D．淋巴转移
E．癌细胞种植于膀胱
参考答案：B
_____ some teenagers don't realize is _______ difficult life can be after they get addicted to drugs. [ ]
A.What, how
B.That, how
C.What, what a
D.That, what
颅内最常见的肿瘤是（）。
A.星形细胞瘤
B.混合胶质瘤
C.脑膜瘤
D.髓母细胞瘤
E.室管膜瘤
