Before she began to study at Beijing University, she()in a factory for five years.
A. had worked
B. worked
C. has worked
D. would work
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淫羊藿主要含()
A. 蒽醌类成分
B. 黄酮类成分
C. 生物碱类成分
D. 鞣质
E. 香豆素类成分
在绘制零件的剖面线时应该用()。
A. 虚线
B. 点划线
C. 细实线
新核心系统中创建贷款账号,只能通过“()”交易发放贷款。
A. 无折转账放款
B. 现金放款
C. 放款到内部户