以工业产权、非专利技术作价出资的比例不得超过投资项目资本金总额的()。
A.10%
B.20%
C.30%
D.50%
参考答案:B
当前防治流感最有效的方法是
A.每天服维生素C
B.吃好睡好
C.流感病毒疫苗免疫接种
D.服用抗流感病毒药物
E.体育锻炼
My brother usually _____ his classroom after school. But now he _____ basketball.
A.cleans; plays
B.is cleaning; plays
C.cleans; is playing
D.is cleaning; is playing