题干

如图在两根平行长直导线MN中,通入同方向同大小的电流,导线框abcd和两导线在同一平面内,线框沿着与两导线垂直的方向,自左向右在两导线间匀速移动,在移动过程中,线框中感应电流的方向为(  )

A:沿abcda不变

B:沿adcba不变

C:由abcda变成adcba

D:由adcba变成abcda来源:学。科。网Z。X。X。K

上一题 下一题 0.0难度 选择题 更新时间:2020-01-05 12:11:43

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A

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Visitor Guide to Birch Aquarium General Information

Thank you for respecting the health of our animals and the experience.

◆ Keep voices low in exhibit areas.

◆ No tapping on marine life displays.

As a courtesy, please silence cell phones.

◆ Please use trash and recycling bins.

◆ Birch Aquarium is smoke-free facility.

Photography

    For the safety of our live animals, please do not use flash photography. Visitors may be photographed or videotaped by aquarium staff for professional use, or by the media covering aquarium news. Entry into the aquarium grants permission for use of these images.

Refreshments

    Splash Cafe offers a variety of gourmet, sustainable, and organic sandwiches, snacks, and beverages.

Drinks, food, and gum are not permitted inside the aquarium.

Restrooms & Baby Care

Changing tables are located in both the men's and women's restrooms.

Re-entry

    Please keep your ticket or have hand stamped at the Visitor Service Office if you plan to exit and re-enter the same day , including visits to Splash Coffee Shop.

Visitors with Disabilities

    See the Visitor Information Center for assistance. All exhibits are wheelchair accessible. Wheelchairs are available at no charge.

Emergencies /First Aid/ Lost & Found

Go to the Visitor Service Office or alert the nearest staff member.

Don't Miss!

    Watch a diver hand-feed the fishes—including three species of sharks—during our Kelp Tank Dive Show.

Learn about this unique and beautiful undersea world during a live, interactive presentation. After your visit, view the exhibit at home through our live, online Kelp Cam.