【单选题】Some people say that the best way to reduce the body's mid-section is to do stomach exercise. Many people believe that when specific muscles are exercised, the fatty tissues in the immediate area are ...
A.
should exercise all the muscles of your body
B.
should exercise that specific part of your body
C.
should do stomach exercises
D.
can do any kind of exercise
【简答题】低压电器的“低压”通常是指工作在直流______或交流______以下的用电器。
【单选题】 Let’s do some reading, ________?
【单选题】Let’s help the old lady do some cleaning, ?
【单选题】do some exercise. [ ]
【多选题】通常是指工作在直流电压( ) 、交流电压 ( ) 及以下电路中的电器为低压电器。