关节腔内注药无效时切开引流为
A．急性血源性骨髓炎B．膝关节滑膜炎C．化脓性关节炎D．膝关节单纯滑膜结核E．膝关节全关节结核
参考答案：C
I recommended _____ an English-Chinese dictionary, which I thought would be of great help to his studies. [ ]
A. buying
B. bought
C. to buy
D. be bought
个人所得税法第六条规定：工资、薪金所得，以每月收入额减除费用2000元后的余额，为应纳税所得额。这表明
A．我国的税收将大幅度减少
B．税收具有固定性的特征
C．税收是可以随意变化的
D．税收具有无偿性的特征
