（ ）不管是否經(jīng)承運(yùn)人同意，凡在飛機(jī)上載運(yùn)的人員都可稱為旅客。
1、正確錯(cuò)誤
暫無解析
試說明蘇軾《前赤壁賦》的時(shí)代背景。
“Early to bed ，early to rise ”makes a man healthy, wealthy and wise.It's good for the body.This is an old saying . Have you heard of it before? It means that we must go to bed early at night，and get up early in the morning.Then we shall be healthy.We shall also be rich and clever.That is true .The body must have enough sleep to be healthy.Children of young age should haveenough sleep ，or they can't do their work very well. They will not be wise and they may not become。wealthy! .The body also needs exercise: walking, running, jumping, swimming, playing games and all other。exercise .Exercise keeps the body strong. Exercise also helps the blood to move around inside the.body .This is very important.Our blood takes food to all parts of our body.The head also needs.blood .Exercise helps us to think better.
根據(jù)短文內(nèi)容 ，回答問題.
1.What does “early to bed .early to rise ”mean?
2.What must the body have to be healthy?
3.What will happen to Children of young age who don't have enough sleep?
4.What keeps the body strong?
5.What takes food to all parts of our body?
為測(cè)定某黃銅(銅、鋅合金)中銅的質(zhì)量分?jǐn)?shù)，稱取32.5g該黃銅粉末放入燒杯中，再向燒杯內(nèi)加入200g 稀硫酸(足量) ，每隔10分鐘測(cè)燒杯內(nèi)(不含燒杯)剩余物質(zhì)的質(zhì)量，測(cè)得數(shù)據(jù)如表：
(1)完全反應(yīng)后生成氫氣的質(zhì)量為_____
(2)計(jì)算該黃銅中銅的質(zhì)量分?jǐn)?shù)(寫出計(jì)算過程)
論述生態(tài)學(xué)的基本視角。
