一般认为额定转速高于()以上的属于高速马达。
A、100r/min
B、300r/min
C、500r/min
D、600r/min
参考答案:D
根据下面的图判断句子的正误,正确的写T,错误的写F。
( ) 1. My mother is wearing pants.
( ) 2. My grandfather is wearing a hat.
( ) 3. My grandmother is wearing a skirt.
( ) 4. My father is wearing a sweater.
( ) 5. I am wearing pants and a skirt.
成品