听录音,选出所听句子中含有的单词或词组。 ( ) 1. A. turn left ( ) 2. A. put on ( ) 3. A. on the ice ( ) 4. A. cold ( ) 5. A. teach B. turn right B. stand up B. on the snow B. snowy B. learn C. turn around C. sit down C. on the table C. rainy C. skate
【单选题】Consider the uniformly rotating object shown below. If the object’s angular velocity is a vector (in other words, it points in a certain direction in space) is there a particular direction we should a...