单相电度表主要由一个可以转动的铝盘和分别绕在不同铁芯上的一个()和一个电流线圈组成。
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万用表实质是一个带有整流器的()。
A. 磁电式
B. 电磁式
C. 电动式
What feature of the product is mentioned？
A. It is easy to move.
B. It is reasonably priced.
C. It is sold in major department stores.
D. It has multiple shelves.
What is suggested about the registration forms？
A. Mr. Porter has already submitted them to Mr. Ortiz.
B. They must be submitted by the end of the month.
C. Mr. Ortiz wanted to revise them before the workshops.
D. Mr. Porter wants to receive them by August 10.
What should Mr. Porter do with the unused handbooks？
A. Discard them in no time
B. Keep them for the next workshop
C. Return them by mail
D. Sell them to others
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