下列为铝青铜的牌号是（）。
A.QSn4-3
B.QAl9-4
C.QBe2
D.QSi3-1
参考答案：B
骨肿瘤的治疗原则是（）
A.早期诊断
B.早期截肢
C.早期放疗
D.早期寻找原发灶
E.早期化疗
If you are Zhang Hong, which of the following expressions is right when you pick up a telephone?
[ ]
A. Hello! This is Zhang Hong.
B. I'm Zhang Hong.
C. Who are you?
D. Where are you?
