Isthere life on Mars ? We have wondered about Mars since we first learned that it is a planet.老师，这里宾语从句中的it is没有使用it was, 原因是a planet是客观事实/真理，所以要求用is呢？还是因为是非正式语体的原因呢？如果是客观事实/真理，能理...
...地方，望大家帮忙解答，谢谢！！After the arrival of hunter-gatherers in the southwestern region of North America, several alternative types of agriculture emerged, all involving different solutions to the Southwest’s fundamental problem: how to obtain enough water to grow c...
Snakes did not acquire their poison for use against man but for use against prey such as rats and mice, and the effects on these of viperine poisonis almost immediate. 蛇产生毒液不是用来对付人类的，而是用于捕食老鼠耗子之类的猎物的， 毒蛇的毒液几乎能立...
—______in your city now?—Very hot at noon but very cool at night.A. How is the weather likeB. What is the weather likeC. How does the weather look likeD. What is the weather答案为 B，请问为什么？这四个选项是不是有的不存在？谢谢！
... been developed to help us escape the tyranny of sugars and fats, they are not without their own risks.句中as a chapter on substitute foods shows起什么作用，是什么成分，可以详细说明一下吗？
...t know what to do after class to follow up on the subject. （confusion）Thereis still _____________________________________________________.请教老师：1. After class 是时间状语，to follow up on the subject 是目的状语？它们的位置可以随意调整，如：Some students st...
...o make, and
buying loads of new clothing (or throwing out old clothing) isnot healthy for
the environment. So what to do with all those perfectly-good-but-you’re-maybe-a-little-sick-of-them
clothes piled on your bedroom floor? Hold a clothing swap. It’s the best way to
get rid of your used clot...
...d. And, as Carreyrou writes, when these employees suspected the device was not working-the results were being faked and the lives of patients were put at risk-they were fired, often escorted off the premises that very day by security personnel. 5. Some board members and investors wondered about...
Q's response serves to counter any use by M of the evidence about 85 to 90 year olds in supports of which one of the following hypotheses? 请问老师这道题目的问题到底是说 Q 的假设还是 M 的假设? 如果是后者, 正常的语序应该是怎样的? 想了很久了一直...
The American medical school isnow well along in the second century of its history.be along 是正处在...的意思吗？along在这是介词吗？in the second century of its history意思是在他的历史的第二个世纪里？
I love the atmosphere you get at a good play, as if you are all in an enchanted circle for those two hours the play ison.这句话怎么翻译，特别是 for those，怎么理解？ 另外 two hours the play ison，是宾语前置，the play ison two hours？
...t come back. 她害怕她妈不回来了。She’s frightened that her
ex-husband will find her. 她怕前夫会找到她。She kept perfectly still,
frightened that the dog might attack her. 她一动不动，害怕狗会咬她。5. 用于be
frightened to death表示强调，其意为“害怕得...
What it does mean it that the book business will go through a transformationin the next decade or so more profound than any it has seen since Gutenberg introduced printing from moveable type in the 1450s.老师好，请问一下这句子加粗部分中的it应该怎样理解？我的理解是“it ...
In countries where thereis conscription men are called up at the age of eighteen. 在实行征兵制的国家里，18岁的男子要应征服役。请问这个句子中的where thereis conscription 是定语从句还是地点状语从句？为什么？