abrupt（）

A.gradual

B.omplete

C.predicted

D.sudden

A.noticeable

B.random

C.variable

D.sudden

A.sudden

B.ttraction

C.meet

D.obtain

A、A. sudden

B、B. erect

C、C. erupt

D、D. corrupt

I have to apologize for myabruptdeparture yesterday

A late

B sudden

C unfriendly

D untold

选出意思最为相近的一项

It can be inferred from the second paragraph that______.

A．various immigrant flows will help the promotion of English language

B．an abrupt stop in Mexican immigration is around the corner

C．the sudden stop in legal immigration will often cause a sudden increase in illegal entries

D．former Congresswoman Barbara Jordan is strongly against Mexican immigration to the US

It can be inferred from the second paragraph that ______.

A．various immigrant flows will help the promotion of English language

B．an abrupt stop in Mexican immigration is around the corner

C．the sudden stop in legal immigration will often cause a sudden increase in illegal entries

D．former Congresswoman Barbara Jordan is strongly against Mexican immigration to the US

According to the passage, over the past 110 000 years, world temperature .

A．has been keeping rising

B．has risen and fallen at regular intervals

C．has experienced no rapid and sudden changes

D．has experienced both smooth and abrupt changes

A new study suggests that thick crustal plugs and weakened mineral grains may explain a range of relatively speedy moves among tectonic plates around the world, from Hawaii to East Timor. Traditionally, scientists believed that all tectonic plates were pulled by subducting slabs—which resulted from the colder, top boundary layer of the Earth's rocky surface becoming heavy and sinking slowly into the deeper mantle. Yet that process does not account for sudden plate shifts. Such abrupt movement requires that slabs detach from their plates, but doing this quickly is difficult since the slabs should be too cold and stiff to detach. According to the study, there are additional factors at work. Thick crust from continents or oceanic plateau is swept into the subduction zone, plugging it up and prompting the slab to break off. The detachment process is then accelerated when mineral grains in the necking slab start to shrink, causing the slab to weaken rapidly. The result is tectonic plates that abruptly shift horizontally, or continents suddenly bobbing up. The passage is primarily about

A、the results from new research.

B、the weaknesses of mineral grains.

C、how crust is subducted on the earth’s surface.

D、the types of tectonic plates.