Let us take a brief look at the planet
on which we live. As Earth hurtles through space at a speed of 70,000 miles an
hour, it spins, as we all know, on its axis, which causes it to be flattened at
the Poles. Thus if you were to stand at sea level at the North or South Pole,
you would be 13 miles nearer the centre of the earth than if you stood on the
Equator.
The earth is made up of three major layers — a central
core, probably metallic, some 4000 miles across, a surrounding layer of
compressed rock, and to top it all a very thin skin of softer rock, only about
20 to 40 miles thick — that’s about as thin as the skin of an apple, talking in
relative terms.
The pressure on the central core is
unimaginable. It has been calculated that at the centre it is 60 million pounds
to the square inch, and this at a temperature of perhaps 10,000 degrees
F
A. ( There is great pressure at the centre
B. ( Earthquake waves can move vertically
C. ( The outer layer is made of rock
D. ( The heat at the centre is too great
更多"Let us take a brief look at the pla"的相关试题:
[单项选择]
Let us take a brief look at the planet
on which we live. As Earth hurtles through space at a speed of 70,000 miles an
hour, it spins, as we all know, on its axis, which causes it to be flattened at
the Poles. Thus if you were to stand at sea level at the North or South Pole,
you would be 13 miles nearer the centre of the earth than if you stood on the
Equator.
The earth is made up of three major layers — a central
core, probably metallic, some 4000 miles across, a surrounding layer of
compressed rock, and to top it all a very thin skin of softer rock, only about
20 to 40 miles thick — that’s about as thin as the skin of an apple, talking in
relative terms.
The pressure on the central core is
unimaginable. It has been calculated that at the centre it is 60 million pounds
to the square inch, and this at a temperature of perhaps 10,000 degrees
F
A. ( too deep to work in
B. ( too hot to work in
C. ( close to the centre
D. ( still in use
[单项选择]She（ ）making tea for us as soon as she let us in
A. set out
B. set up
C. set off
D. set about
[填空题]Let us see how dictionaries are made and how editors arrive at definitions. The task of writing a dictionary begins with the reading of vast amounts of the (47) of the period or the subject that the dictionary is to cover. As editors read, they copy on cards every interesting or rare word, every unusual or (48) occurrence of a common word, a large number of common words in their ordinary uses, and also the sentences in which each of these words appears, thus:
pail
The daily pails bring home increase of milk.
Keats, Endymion
The (49) of each word is collected, along with the word itself. For a really big job of dictionary writing, such as the Oxford English Dictionary, millions of such cards are collected, and the task of editing (50) decades. As the cards are collected, they are alphabetized and (51) When
[简答题]We must insist that you would let us know when you intend to deliver the goods.
[单项选择]Let us suppose that you are in the position of a parent. Would you allow your children to read any book they wanted to without first checking its contents Would you take your children to see any film without first finding out whether it is suitable for them If your answer to these questions is "yes", then you are either extremely permissive or just plain irresponsible. If your answer is "no", then you are exercising your right as a parent to protect your children from what you consider to be undesirable influences. In other words, by acting as a censor yourself, you are admitting that there is a strong case for censorship.
Now, of course, you will say that it is one thing to exercise censorship where children are concerned and quite another to do the same for adults. Children need protection and it is the parents’ responsibility to provide it. But what about adults Aren’t they old enough to decide what is good for them The answer is that many adults are, but don’t make the mistake
A. let their children read any books they like to
B. let their children see the films with their first checking
C. not let their children seen any films they like to
D. not let their children read any books without first checking their contents
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