题目内容

下面表述正确的是

A. 质点作圆周运动,加速度一定与速度垂直
B. 物体作直线运动,法向加速度必为零
C. 轨道最弯处法向加速度最大
D. 某时刻的速率为零,切向加速度必为零

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Known for excellence in teaching, research, and service to the community, the University of Victoria serves approximately 17,000 students. It is favored by its ______ on Canada’s spectacular west coast, in the capital of British Columbia.

Founded in 1636 Harvard has a 380-acre urban campus with easy access toBoston. It has a total ______ of about 18,500 students. This university comprises many different schools such as the Faculty of Arts and Sciences, School of Business Administration and School of Education.

填空题 Seen from space, our earth, with water covering __70%__ of its surface, appears as the beautiful “blue planet.” The bare land areas appear red or ____, dark green shows where there is ____ cover, and the white means snow. Besides the seven major land areas, called ____, there are thousands of ____. Some of these are arranged in groups and some stand alone in the great oceans. Arms of land which reach out into the water are called peninsulas; seas, gulfs and bays are arms of the ____ which lie between islands and peninsulas. A narrow piece of land ____ two larger land

A. narrow stretch of water between two land areas is called
B. strait or
C. __channel__.

Question 3 ____?

A. Travel on business.
B. Fly to New York.
C. Prepare some documents.
D. Have a holiday.

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