证明任意两个有相同维数的有限维赋范空间是线性同胚。再此推出下述,结论： （a)有限维空间的闭有界子集是紧的

______has the worlds largest coral reef "the Great Barrier Reef".

A．Canada

B．Australia

C．Ireland

D．New Zealand

The Great Barrier Reef lies off______coast of Australia.

A．the southeast

B．the southwest

C．the northeast

D．the northwest

ed sentence in the passage？ Incorrect answer choices change the meaning of the sentence in important ways or leave out essential information.

A．The size and age of the Great Barrier Reef have caused many scientists to take up residence in its vicinity.

B．The Great Barrier Reef is home to a great variety of marine species, according to interested scientists.

C．The Great Barrier Reef is scientifically interesting because of its size, age, and ecological diversity.

D．Many ancient, large, and scientifically interesting marine organisms live in the vicinity of the Great Barrier Ree

ed sentence in the passage？ Incorrect answer choices change the meaning of the sentence in important ways or leave out essential information.

A．The size and age of the Great Barrier Reef have caused many scientists to take up residence in its vicinity.

B．The Great Barrier Reef is home to a great variety of marine species, according to interested scientists.

C．The Great Barrier Reef is scientifically interesting because of its size, age, and ecological diversity.

D．Many ancient, large, and scientifically interesting marine organisms live in the vicinity of the Great Barrier Ree

Do you still remember ______ to Professor Lee during last visit？

A．to have introduced

B．having introduced

C．to introduce

D．being introduced

Do you still remember ______ to our president when you visited our school last term？

A．to be introduced

B．being introduced

C．introduced

D．to have been introduced

Do you still remember the chicken farm ______ we visited three months ago？

A．where

B．when

C．that

D．what

_________(无论现在采取什么措施)