【单选题】We should do something to stop the boy from________. [ ]
A.
to wear that silly earring
B.
wear that silly earring
C.
wearing that silly earning
D.
wears that silly earning
【单选题】商标在市场消费过程中,是企业形象和()的象征,对商品起着一定的促销作用。
【单选题】商标在市场消费过程中是企业形象( )的象征,对商品起着一定的促销作用
【判断题】内聚能密度或溶度参数相近”原则适用于极性聚合物溶剂的选择。