采购原材料并验收入库，其原始凭证必须附有（）证明。
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A．HoweverB．orC．IndeedD．Rather
A. However
B. or
C. Indeed
D. Rather
根据《中华人民共和国会计法》的规定，下列属于会计核算内容的有（）。
下列关于支付结算的各项表述中，不符合规定的有（）。
How can nanotechnology be used to make a drug more effective？
A. By making a drug target the focus of a disease．
By changing the structure of the body cells．
C. By lowering the side effects caused by a drug．
D. By letting a patient take a dose as large as possible．
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