The clerk has no problem ______ with any kind of customers.
A. deal
B. to deal
C. deals
D. dealing
What does “dispatch consignments” mean?
A. 准备货物
B. 发运货物
C. 拜访客户
D. 准时装货
与底物分子结合的基团是()
A. 必需基团
B. 活性中心
C. 催化基团
D. 结合基团
E. 结合酶
company 的复数形式为_____
A. companies
B. companys
C. companyes
D. company
微信支付 
支付宝支付