【单选题】In the past decades, sea ice _____in the Arctic as a result of global warming.[ ]

【简答题】在生物与环境相互作用的漫长过程中，环境不断改变，影响着生物；生物也不断进化，适应并影响环境。请分析下列生物与其所处环境之间的关系，回答问题。(1)“人间四月芳菲尽，山寺桃花始盛开”，这一诗句体现出的生物与环境的关系是____________。(2)在沙漠地区植树造林可以防风固沙，这个事例体现出的生物与环境的关系是__________。(3)莲“中通外直”，其地下茎（莲藕）和荷叶叶柄中都有贯通的气腔...

【单选题】The science of medicine,progress has been very rapid lately, is perhaps the most important of all the sciences.

【简答题】完形填空。 As we all know, human beings have five senses.1.________have you ever heard thatinstead of having five senses like humans, plants have just one or two senses? Some plants can sense sunlight and ...

【单选题】棉蚜虫被瓢虫捕食时，被捕食的棉蚜虫会立即释放一种报警信息激素，于是周围的棉蚜虫纷纷跌落，这种现象是（　　）

【单选题】16.You can't imagine that a well-behaved gentleman__________be so rude to a lady.

【单选题】若在玻片上写有字母“d”，放在显微镜下观察，在视野中看到的物像是（　　）

【单选题】I don’t think you have made great mistakes, _______?

【简答题】Advertisers tend to think big and perhaps this is why they’re always coming in for criticism. Their critics seem to resent them because they have a flair for self-promotion and because they have so mu...

【简答题】— When could you have a meal with me? — I'd like to go ___ it is convenient to you. A.whicheverB.wheneverC.whateverD.wherever