About how long does it take to do the experiment？
A．Just five minutes.
B．Slightly less than an hour.
C．Between one and two hours.
D．A little more than two hours.
相关问题推荐
-
Each one of them prayed that he might lead her home to be his wedded wife, so greatly were they __ at the beauty of violet-crowned Cytherea.
A．astonished
B．amazed
C．astounded
D．shocked -
听力原文： Israeli Prime Minister Ariel Sharon and Secretary of State Colin Powell have agreed on a seven-day violence-free period to test a U-S-brokered cease-fire with the Palestinians. This would be followed by a cooling off period of six weeks and the introduction of measures to re-build trust between the two sides.
Mr. Sharon and Mr. Powell announced an agreement between Israel and the Palestinians toward a resumption of peace negotiations. Appearing at a joint news conference, they said there must be a seven-day period of complete calm, followed by a cooling-off period. Mr. Sharon says he and Mr. Powell are completely in accord with the principle that the violence must stop before political progress can begin.
How long will the cooling off period be according to the agreement between Israel and the Palestinians？
A．Seven days.
B．Seven weeks.
C．Six weeks.
D．Six days. -
Good advice is __ price.
A．over
B．beyond
C．above
D．top -
The estimates in Economic Outlook show that in rich countries ______.
A．heavy industry becomes more energy-intensive
B．income loss mainly results from fluctuating crude oil prices
C．manufacturing industry has been seriously squeezed
D．oil price changes have no significant impact on GDP -
Could the bad old days of economic decline be about to return？ Since OPEC agreed to supply-cuts in March, the price of crude oil has jumped to almost $ 26 a barrel, up from less than $10 last December. This near-tripling of oil prices calls up scary memories of the 1973 oil shocks resulted in double-digit inflation and global economic decline. ,So where are the headlines warning of gloom and doom this time？
The oil was given another push up this week when Iraq suspended oil exports. Strengthening economic growth, at the same time as winter grips the northern hemisphere, could push the price higher still in the short terra,
Yet there are good reasons to expect the economic consequences now to be less severe than in the 1970s. In most countries the cost of crude oil now accounts for a smaller share of the price of petrol than it did in the 1970s. In Europe, taxes account for up to four-fifths of the retails price, so even quite big changes in the price of crude have a more muted effect on pump prices than in the past.
Rich economics are also less dependent on oil than they were, and so less sensitive to swings in the oil price. Energy conservation, a shift to other fuels and a decline in the importance of heavy, energy-intensive industries have reduces oil consumption. Software, consultancy and mobile telephones use far less oil than steel or car production. For each dollar of GDP （in constant prices) rich economics now use nearly 50% less oil than in 1978. The OECD estimates in its latest Economic Outlook that, if oil prices averaged $ 22 a barrel for a full year, compared with $13 in 1998, this would increase the oil import bill in rich economies by only 0.25-0.5% of GDP. That is less than one-quarter of the income loss in 1974 or 1980. On the other hand, oil-importing e merging economies--to which heavy industry has shifted--have become more energy-intensive, and so could be more seriously squeezed.
One more reason not to lose sleep over the rise in oil prices is that, unlike the rises in the 1970s, it has not occurred against the background of general commodity-price inflation and global excess demand. A sizable portion of the world is only just emerging from economic decline. The Economist's commodity price index is broadly unchanging from a year ago. In 1973 commodity prices jumped by 70%, and in 1979 by almost 30%.
The main reason for the latest rise of oil price is ______.
A．global inflation
B．reduction in supply
C．fast growth in economy
D．Iraq's suspension of exports