多项选择题

进口以下药品和药材，经营单位向海关交验的单证哪几项是无效的。( )

A．一般药品和药材——省卫生厅出具的证明
B．麻醉药品——麻醉品进口准许证
C．精神药物——进口药品报验证明
D．临床急需血液制品——省级卫生厅批准文件
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单项选择题
We are pleased to place with you an order for the following items on the that ______ they will be supplied from current stock.
A. understanding
B. understand
C. position
D. stock
单项选择题
The shipment was delayed because you had failed ______ the necessary space.
A. to order
B. to place
C. to take
D. to book
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