当你在复习功课时,邻居却在唱卡拉OK,使你无法学习。为减少噪声影响,下列措施中肯定无效的是( )
A:将门窗关紧
B:把门窗打开,加快空气流通
C:用棉花塞住耳朵
D:与邻居好好商量请他小声点
20元和50元人民币上所显示的景观分别是( )
I was found I was carried _____ on the earth and fell over.
小明要外出旅行,下列哪种天气适合( )
It's impossible the work in three days.