无污染自然环境空气中的一氧化碳浓度约为()ppm。
A.1
B.10
C.50
D.100
参考答案:A
读短文,判断正(√)误(×)。
Mike is a good student. He gets up at six thirty every day. He likes to wear his blue sweater. He goes to
school at seven fifteen. He has English class at eight o'clock. He likes English very much. He has lunch at home.
In the afternoon, he always plays football on the school playground. He does homework after dinner. He goes to
bed at nine o'clock.
( ) 1. Mike gets up at 6: 20 every day.
( ) 2. Mike has a blue sweater.
( ) 3. Mike has lunch at school.
( ) 4. Mike likes to play football.
( ) 5. Mike does homework after school.
下列各项支出在工业企业中不能作为营业外支出的是()。
A.材料让售成本
B.固定资产盘亏损失
C.职工子弟学校经费
D.企业赔款、罚款