種子萌發(fā)需要適宜的環(huán)境條件，包括適量的        ，適宜的        和充足的         。
水分  溫度 空氣解析:
略
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語(yǔ) 來(lái)源： 題型：

．某容器質(zhì)量為200 g，裝滿水后總質(zhì)量是700 g，裝滿某液體時(shí)總質(zhì)量是600g，則該容器的容積為    _________crn3，此液體的密度為___________ kg／m3．

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源： 題型：

（6分）生物防治是利用________防治病蟲害的技術(shù)，這種技術(shù)不僅可節(jié)省經(jīng)費(fèi)，還可減輕使用農(nóng)藥而造成的環(huán)境污染，主要包括以鳥治蟲、________和________三個(gè)方面。

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源： 題型：

有些細(xì)菌、真菌與動(dòng)植物共同生活在一起，相互­­­________ ，彼此­­­________ ，一旦分開，兩者都不能獨(dú)自生活，這種現(xiàn)象叫­­­________ ；如地衣。

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源： 題型：閱讀理解

Many cultures have different ideas about why people catch colds. For example in the United States, some people think that you can catch a cold if your feet get cold. So, mothers tell small children to wear warm boots in the winter. In other places, including parts of the Middle East, some people believe that strong winds cause colds. So, on trains and buses, people usually don’t like to sit next to open windows. In parts of Europe, some people think that wearing wet clothes will give you a cold. They say that after you go swimming, you should quickly put on dry clothes. Today, scientists know that colds are caused by a virus（病毒）. But the old ideas are still very strong, and many people still follow them to avoid（避免）getting ill.
【小題1】What is the main idea of this reading?
A．People still believe old ideas about why they catch colds.
B．Colds are the biggest health problem in the world.
C．Some people think that strong winds cause colds.
D．You should take good care of your health in winter.
【小題2】Which is NOT a cause（成因）of colds in the reading?
A．bad foodB．wet clothesC．a(chǎn) virusD．strong winds
【小題3】In "people still follow them to avoid getting ill", what does "them" mean?
A．scientistsB．old ideasC．coldsD．dry clothes
【小題4】According to the reading, which of the following is NOT true?
A．There are many different ideas about how people catch colds.
B．Scientists don’t know how people catch colds.
C．Some people think that wearing wet clothes gives you a cold.
D．In the U.S., many small children wear boots in winter.
【小題5】Many people in different countries have ________ ideas about why people catch colds.
A．noB．oneC．the sameD．different

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源： 題型：

---Could I borrow your dictionary?
---___________, but you have to return it tomorrow.
A．I’m sorryB．I’m not sure
C．No problemD．I hope so

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源： 題型：

—Congratulations! You got the first place in the drawing competition. —_______
A．Thank you!B．You’re right.C．Not at all.D．You’re so nice.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源： 題型：

Many _____ in ______ could hear no better than 65-year-old people, for they like pop music.
A．a(chǎn)dults, the USAB．a(chǎn)dults; England
C．teenagers: the USAD．teenagers: England

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源： 題型：

—Excuse me. Where is Mr Green’s office?
—It’s on ______ floor.
A．sevenB．the sevenC．seventhD．the seventh

查看答案和解析>>

同步練習(xí)冊(cè)答案