已知|m-2|+|3-n|=0,则-nm=______.
∵|m-2|+|3-n|=0,
∴m-2=0,3-n=0,
∴m=2,n=3.
∴-nm=-9.
What sport do you like best?
Daniel: I like basketball best. I often watch NBA. I play basketball every day. I am short, but I am strong. I am a good basketball player in our school.
Lucy: Ping-ping is my favourite sport. I am a Chinese and Chinese ping-pong players are the best in the world. I want to be a good ping-pong player too. I often play it every afternoon.
Tom: I am tall and strong. I like football best. My father is a football player. I often watch my father play football. My father often teaches me to play football. I play with my father and others in the park every day.
小题1:What sport does Daniel like?
A.Football
B.Basketball
C.Ping-pong
D.Swimming小题2:Who likes football best?
A.Daniel
B.Tom
C.Lucy
D.Nobody小题3:What does Tom’s father do?
A.A teacher.
B.A doctor.
C.A policeman.
D.A football player.小题4:When does Lucy often play ping-pong?
A.Every morning.
B.Every afternoon.
C.Every evening.
D.At the weekend.小题5:Which of the following is RIGHT?
A.Daniel is tall.
B.Lucy wants to be a doctor.
C.Tom is thin.
D.The passage(文章) is about favourite sports.
()是指不同形式的催化同一反应的酶,它们之间氨基酸的顺序、某些共价修饰或三维空间结构等可能不同。