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In summer, i'm offen get up verry early, doing morning execise and i go to my favourite sport centre . Sometimes i'm go to picnic with my family .In the evening i'm always have dinner with my family . by the June ,i spend most time doing execises , and prepare for beginning of term
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As a student, I don’t have much free time beside those I love, so my summer vacation is the duration during which I often busy myself with many things at home all day. In the day time,I often do sundry things for my grandmother and help my parents to do housework. In the evening, I go out with some of my old friends.We often chat with each other in a cafe. Usually, when I am free from doing housework, I go and visit close relatives in my neighborhood and ask them about their life and business. In the late evening, I watch films on TV or read novels or books to widen my understanding. I oftengo to bed very late. In my mind, I always want my short summer vacations to be not only comfortable for me but also useful for my beloved people.
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Khẳng định nào sau đây sai?
A. y= tanx là hàm lẻ.
B. y= cot x là hàm lẻ.
C. y= cosx là hàm lẻ.
D. y= sinx là hàm lẻ
Cho axit salixylic (X) (axit o-hiđroxibenzoic) phản ứng với metanol có H2SO4 đặc xúc tác thu được metyl salixylat (Y) dùng làm thuốc giảm đau. Cho Y phản ứng với dung dịch NaOH dư thu được hỗn hợp sản phẩm trong đó có muối Z. Công thức cấu tạo của Z là
A. o-NaOC6H4COOCH3.
B. o-HOC6H4COONa.
C. o-NaOOCC6H4COONa.
D. o-NaOC6H4COONa.
chủ đề là gì mình trả lời cho
What do they do in the hospital