to even breathe in the air – and when you do, you can feel the little hairs in your nostrils (鼻孔.... They are bursts (盛开) of red, purple and yellow, growing up out of ground that has been buried and frozen ……

天体) and their activities. So what is the gravitational wave? If you move your hand through a still pool... happens when heavy objects move through space-time, causing it to stretch and contract, making ……

为什么季节变换时容易生病？When the temperature goes down, many people get sick and catch a cold. Some of us... in spring and fall. And viruses spread (传播) most quickly when the air is cold and dry. So people get ……

(液体); this is what happens in clouds, which are cool.2. The cold pan turns the vapor back to liquid (液体); this is what happens in clouds, which are cool.3. When lots of vapor has condensed (凝结 ……

冬天舌头为什么会粘在金属杆上？Have you ever put your tongue (舌头) on a metal pole (金属杆) outside in winter? What happens if you do this? Oops, your tongue gets stuck to (粘在) the pole! Why is that?Your tongue is warm ……

冬天舔金属杆为什么会粘住舌头？Have you ever put your tongue (舌头) on a metal pole (金属杆) outside in winter? What happens if you do this? Oops, your tongue gets stuck to (粘在) the pole! Why is that?Your tongue is warm ……

Experience is not what happens to you; it’s what you do with what happens to you. ……

. Please tell me, what should I do?ZaizaiZaizaiHi Zaizai,Hi Zaizai,Back when I was in high school, I.... When it comes to your studies, this means making room in your schedule to go walk in the park, listen ……

of spring, grass bursts into my mind. It is an energetic envoy (使者) of spring, coming out to bring warmth... are blooming (盛开)! In your opinion, which kind of plant best represents this season? Why?Cao Xiangchen, 17 ……

(or your own hair) a few times.3 Hold comb next to stream of water without touching it; see what happens.4... happened?When you comb your hair, tiny charged electrons (电子) move between the comb and hairs.The comb ……

indoors if possible b. stay somewhere coldc. wear a mask when you go out d. keep your hands cleanA. abc B... pollen (花粉) and dust. It makes some people sneeze and itch (发痒). What exactly happens to them?Choose ……

not to give up your regular workout yet. But when you don't have much time or are feeling bored with your.... Exercise videos: When you use a vigorous workout tape, try following along in short bursts, then hit ……

为什么季节转换时容易生病？词数 150 建议阅读时间 3分钟When the temperature goes down, many people get sick and catch a cold... get a cold easily in spring and fall. And viruses spread (传播) most quickly when the air is cold ……

for the common cold? 3. What does your body do when a virus attacks your body? 4. Why can’t people... of kinds cold viruses (病毒) out there. It is hard to know which one you will get, so there isn ……

outdoors in cold weather. It means the body loses heat faster than it creates it. When your... by extreme (极端的) weather. Hypothermia means loss of body heat. It sometimes happens when people ……