China almost has all kinds of landforms, such as_____（）

A . regularly B . accidentally C . sometimes D . successfully

A . identify B . integrate C . ignore D . overlook

A．minds B．heads C．hearts D．brains

A.will be B.would have been C.will have been D.would be

When it comes to success, luck can mean being in the right place to meet someone, or having the right skills to get a job done. It might mean turning down an offer and then having a better offer come along. Nothing can replace hard work, but working hard also means you're preparing yourself opportunity. Opportunity very often depends on luck. How many of the great inventions and discoveries came about through a lucky mistake or a lucky chance？ One of the biggest lucky mistakes in history is Columbus' so-called discovery of America. He enriched his sponsors and changed history, but he was really looking for India. However, Columbus' chance discovery wasn't pure luck. It was backed up by years of studying and calculating. He worked hard to prove his theory that the world was round. People who work hard help make their own luck by being ready opportunity knocks. When it comes to success, hard work and luck are always hand in hand. (30) A．Hard work is the most important thing for one's success. B．Hard work may invite good luck. C．Good luck plays an important role in one's success. D．Success has nothing to do with luck.

A．Right. B．Wrong. C．Doesn't say.

A．dined the dishes,tasted B．dined,tasted C．dined,were tasted D．dined the dishes,taste

But first, the essence: Is there something about the brain cells work to explain the effect？ In 1978 the neuroscientist Vernon Mountcastle devised a model of the neural structure of the brain's gray matter. Looking like a thick band of colorful bead work, it represents the firing patterns of groups of neurons. Building on Mounteastle, Shaw and his team constructed a model of their own. On a lark, Xiaodan Leng, who was Shaw's colleague at the time, used a synthesizer to translate these patterns into music. What came out of the speakers wasn't exactly toe-tapping, but it was music. Shaw and Leng inferred that music and brain-wave activity are built on the same sort of patterns. "Gordon is a contrarian in his thinking," says his longtime friend, Nobel Prize-winning Stanford physicist Martin Peri. "That's important. In new areas of science, such as brain research, nobody knows how to do it." What do neuroscientists and psychologists think of Shaw's findings？' They haven't condemned it, but neither have they confirmed it. Maybe you have to take them with a grain of salt, but the experiments by Shaw and his colleagues are intriguing. In March a team led by Shaw announced that young children who had listened to the Mozart sonata and studied the piano over a period of months improved their scores by 27% on a test of ratios and proportions. The control group against which they were measured received compatible enrichment courses--minus the music. The Mozart-trained kids are now doing math three grade levels ahead of their peers, Shaw claims. Proof of all this, of course, is necessarily elusive because it can be difficult to do a double- blind experiment of educational techniques. In a double-blind trial of an arthritis drug, neither the study subjects nor the experts evaluating them know which ones got the test treatment and which a dummy pill. How do you keep the participants from knowing it's Mozart on the CD？ In the first paragraph Gordon Shaw's concern is shown over ______. A．the open hostility by the media towards his findings B．his strength to keep trying out the "Mozart effect" C．a widespread misunderstanding of his findings D．the sharp disagreement about his discovery 此题为多项选择题。

A．soldiers B．thinkers C．politicians D．writers

A.So often this happened B.So often has this happened C.This happened so often D.This has happened so often