根据《专利法》的规定,专为科学研究和试验而使用有关专利的不视为侵权行为。
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药用部位是全草的药材是()
A. 肉苁蓉
B. 荆芥
C. 麻黄
D. 穿心莲
E. 紫花地丁
药用部位是地上草质茎的药材是()
A. 肉苁蓉
B. 荆芥
C. 麻黄
D. 穿心莲
E. 蒲公英
外国近代高等教育开始于17世纪40年代。
A. 正确
B. 错误
A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the () (1) MEP is lower and the scavenging air is cooling the exhaust gases (2) valve overlap in a four-stroke
A. (1) only is correct
B. (2) only is correct
C. both (1) and (2) are correct
D. Neither (1) or (2) are correct