A:20°
B:40°
C:70°
D:110°
Don't sit there ____. Come and help me with the table.
—_______ ten o'clock _______ night.
噪声已经成为严重污染源,极大地阻碍了人们生活质量的提高.防噪已成为日常课题.“轻手轻脚过楼道”是在 ____减弱噪声,而用空心砖砌墙则是在 ____减弱噪声.
——I often have hamburgers for lunch.
——You'd better not. It's bad for you _________ too much junk food.
观察漫画《数码时代的孤单》。下列给晚辈的建议最合适的是( )