日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

A.藏族﹣﹣《格薩爾》史詩B.新疆維吾爾族﹣﹣大歌

C.蒙古族﹣﹣木卡姆藝術D.侗族﹣﹣呼麥

A.當地震發生時，若在馬路上行走，應該迅速避開電線桿和圍墻，跑到較開闊的地區

B.當地震發生時，若在較堅固的教室里，可以躲避在課桌和講臺下

C.當地震發生時，居住在六樓的居民可以跳窗逃生，減少傷亡

D.當泥石流發生時，應向垂直于泥石流流動方向的山坡上跑

據此完成下面小題。

【1】這條河流有可能是

A.珠江B.塔里木河C.黑龍江D.黃河

【2】從根本上治理河流泥沙淤積、泛濫的措施是

A.跨流域調水B.修建水庫C.植樹種草D.加高河堤

A.“黃梅時節家家雨，青草池塘處處蛙”反映了黃河中下游地區的梅雨天氣

B.“天蒼蒼，野茫茫，風吹草低見牛羊”描寫了內蒙古高原水草豐盛、牛羊肥壯的景象

C.“早穿皮襖午穿紗，圍著火爐吃西瓜”反映了溫帶大陸性氣候晝夜溫差大的特點

D.“羌笛何須怨楊柳，春風不度玉門關”反映了非季風區不受夏季風的影響

Some scientists believe that the first plants to appear on Earth over 500 million years ago _____ looked purple, not green. Plants today are green because they use green chlorophyll(葉綠素)to produce energy. _____ these early plants probably used something called retinal, which is a dark purple color.

During the time of the Roman Empire(37BC—476AD), it was very difficult to make purple dye(染料). The dye came from sea snails(海螺). But 10, 000 dead sea snails_____ you just one gram(克) of purple dye...as well as a very bad smell! This _____ purple dye was called Tyrian purple, and it was the preferred _____ of emperors.

In 16thcentury England, purple was only _____ the king's family members. Queen Elizabeth I's clothes were purple, but ordinary people were not allowed to _____ the color.

In 1856, William Perkin, an 18yearold science student, noticed something strange while doing an experiment. The chemicals(化學藥品) he used to clean his instruments______ with the chemicals he used in his experiment and produced a bright purple color. This discovery led Perkin to start a company using this chemical mixture to make purple dye. The dye was much cheaper than seasnail dye. Thanks to Perkin, now anyone can afford to wear purple clothes.

【1】A.peacefulB.popularC.excitingD.serious

【2】A.historyB.styleC.researchD.product

【3】A.graduallyB.especiallyC.exactlyD.probably

【4】A.AndB.SoC.ButD.Or

【5】A.gotB.passedC.wastedD.cost

【6】A.basicB.harmfulC.specialD.perfect

【7】A.colorB.smellC.plantD.animal

【8】A.forB.inC.asD.with

【9】A.wearB.sellC.changeD.make

【10】A.comparedB.mixedC.collectedD.kept

A.人是生產者，越多越好，要快速增長

B.人口增長要根據個人意愿來決定

C.人是消費者，越少越好

D.人口增長要與資源、環境相協調，與社會經濟發展相適應

A.青藏高原雪山連綿，黃土廣布

B.黃土高原溝壑縱橫，植被保護好

C.云貴高原地面崎嶇，石灰巖分布廣泛，有“壩子”

D.內蒙古高原地面坦蕩，植被自西向東為草原－－荒漠草原－－荒漠

A.大聚居、小散居、交錯雜居B.大聚居、小雜居、交錯雜居

C.平均分配居住，沒有特點D.大散居、小聚居、交錯雜居

A.地表形態不同B.緯度高低不同C.地勢高低不同D.海陸位置不同