在拖拉机、汽车上被广泛采用的起动方法是（）
A.人力起动
B.电起动机起动
C.柴油机用汽油机起动
D.柴油机用汽油起动
参考答案：B
_______ about the man wearing sunglasses during night that he was determined to follow him．
A．So curious the detective was
B．So curious was the detective
C．How curious was the detective
D．How curious the detective was
( )属于需求研究。
A．消费者购买动机研究
B．竞争分析
C．消费者的品牌忠诚度
D．产品定价研究
