为某一特定目的而专门组织的一次性全面调查是（）。 A.普查 B.抽样调查 C.一般调查 D.典型调查

. He is not like the young man of the early 19th century who came to sit at the feet of his masters and left as a master. That situation no longer exists, because now it is not only the student who changes. He may grow fast, but science grows still faster.

Today a student cannot master knowledge, he can only be its servant. He knows that he can become familiar (熟悉) with only a small comer of knowledge and that his learning will always be imperfect and imcomplete. But he can still hope to add something to the sum(总量) of knowledge, and so make the situation slightly more difficult for those who come after him.

The phrase "in the second half of the 20th century" means _________.

A．in 1950

B．in the late 2000

C．in 50 years of the 20th century

D．in 1950--2000

What advantage did the 20th century have over the 19th century？

A．The new invention of the train made traveling possible.

B．Information could be spread immediately.

C．People didn’t get as much exercise anymore.

D．Travelling by boat was still dangerous.

What advantage did the 20th century have over the 19th century？

A．The new invention of the train made traveling possible.

B．Information could be spread immediately.

C．People didn’t get as much exercise anymore.

D．Travelling by boat was still dangerous.

American structuralism started in______.

A. the early 20th century

B. the late 20th century

C. the early 19th century

D. the late 1930s and 40s

A、Germany

B、Russia

C、the United States

D、the UK

American structuralism started in______.

A．the early 20th century

B．the late 20th century

C．the early 19th century

D．the late 1930s and 40s

w millennium begins, in terms of world health the progress has been surprisingly slow.

A、Harlem in the 1920s

B、New Orleans at the turn of the 20th century

C、Chicago in the 1940s

D、Soho in the 1950s

A、the early 20th century

B、the late 20th century

C、the late 18th century

D、the mid-19th century