3. 海豚利用聲音相互溝通。

Dolphins use sound to each other.

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語 來源： 題型：

Do you have a mobile phone? Do you send text messages to your friends and family?

Text messaging or texting is becoming very popular. But scientists have discovered that texting can give us problems with our hands. Be careful!Too much texting can cause swelling (腫脹) in our thumbs (拇指) . Our thumbs are not made for pushing small buttons (按鈕) over and over. Scientists call this problem RSI  (重復(fù)性勞損) . Harriet Wilson,who treats many people with RSI,says we need to see how much time we spend in typing text messages. If we spend more than 10〜15 minutes once,we may have problems in the future.

As mobile phones develop,they are getting smaller with buttons closer together. Texting with a smaller phone is worse than using a larger phone with bigger buttons. Using a computer keyboard and playing video games can cause the same problem. So more and more people find themselves with RSI. Among them,most are university students and teenagers,as they do not know the risks of spending so much time using computers,mobile phones and playing video games.

根據(jù)短文內(nèi)容，回答下列問題。

51. What is becoming very popular now?

52. Does the underlined word “once” mean “one time” in the second paragraph?

53. Who is easier to have the problem of RSI?

54. What can also cause the problem of RSI except texting?

55. Which is easier to cause the problem of RSI,using smaller mobile phones or larger ones?

查看答案和解析>>

科目：初中英語 來源： 題型：

七、 書面表達(dá)陳先生是南京人，請(qǐng)你以校報(bào)記者的身份對(duì)陳先生進(jìn)行采訪。以下是你采訪的結(jié)果，請(qǐng)根據(jù)以下結(jié)果寫 一篇關(guān)于陳先生的報(bào)道。陳先生自出生就住在南京，現(xiàn)在的南京變化了許多。過去這里空氣清新，樹木很多,現(xiàn)在建造了新的機(jī) 場(chǎng)。過去人們只能乘公交車，但現(xiàn)在會(huì)有很多選擇，你可以乘坐干凈漂亮的公交車，也可以乘坐地鐵、出租車 等。這些變化給南京帶來了很多的優(yōu)勢(shì)，陳先生看到這些變化非常高興。

查看答案和解析>>

科目：初中英語 來源： 題型：

() 5. Mr Smith in Nanjing since he    to China years ago.

   A. worked; has moved   B. has worked;has moved

   C. has worked;moved   D. was working;moved

查看答案和解析>>

科目：初中英語 來源： 題型：

1. How lucky we are (live) in this modern city!Everything is convenient.

查看答案和解析>>

科目：初中英語 來源： 題型：

() 3. Students in Beijing   away many books to the Hope Primary Schools since 2009.

   A. have given   B. give   C. gave   D. giving

查看答案和解析>>

科目：初中英語 來源： 題型：

3. I  (make) a lot of friends since I came to this school.

查看答案和解析>>

科目：初中英語 來源： 題型：

2. The air in mountain areas is (good) than that in big cities.

查看答案和解析>>

科目：初中英語 來源： 題型：

() 14.— you your watch? — No, .

   A. Did;find out;I didn t   B. Have;found;not yet

   C. Have;looked for;I haven t   D. Did;found;not yet

查看答案和解析>>

同步練習(xí)冊(cè)答案