单项选择题

SECTION A CONVERSATIONS In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow. Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation. The tape-recorder is different from a normal one in many aspects EXCEPT _________.

A．it looks like a spaceship
B．you have to plug it in first
C．it has no on-off power switch
D．one has to learn how to handle it properly

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问答题

[听力原文]The last American frontier, Alaska is the largest of the states in size and the second smallest in population. Nearly everything about this 49th state is big. Its Mount McKinley is higher than any other peak in North America. Its Yukon River is one of the longest navigable waterways in the world. Huge animals sill thrive in its open spaces ... grizzly, black, and polar bears; moose, caribou, musk-oxen, wolves, seals and killer whales. Alaska is a land of spectacular contrasts-smoking volcanoes and frozen tundra, hot springs and ice floes, creeping glaciers and virgin forests. This vast, raw, and rugged land thrusts a chain of volcanic islands more than a thousand miles southwest into the Bering Sea. Reaching beyond the International Date Line, the land area originally spanned four time zones.

单项选择题

The word astute in the second paragraph, first sentence, probably means _________.

A．false
B．ingenuous.
C．suspicious.
D．shrewd.

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