A commutator is made of _____.
A: copper bars
B: nickel bars
C: bronze bars
D: steel bars
A: copper bars
B: nickel bars
C: bronze bars
D: steel bars
举一反三
- Reinforced concrete has steel bars that are placed in the concrete to carry tensile forces.
- Where are they going to sell their products? A: In their own shops B: In snack bars and similar outlets C: In bars and restaurants D: In shopping malls
- Suppose that 500 candy bars are demanded at a particular price. If the price of candy bars rises from that price by 10 percent, the number of candy bars demanded falls to 480. Using the midpoint approach to calculate the price elasticity of demand, it follows that the_________.
- Questions 6 to 10 are based on the following news. A: The annual revenue of China’s Internet bars tops 3.68 billion US dollars. B: The annual revenue of China’ s Internet bars tops 25.58 billion Yuan. C: The annual revenue of China’s Internet bars tops 25.68 billion Yuan. D: The annual revenue of China’s Internet bars tops 128 billion Yuan.
- Excuse me! __________ good bars around here?