【简答题】郁金与姜黄皆具活血、行气止痛之功,但郁金又有____、清心凉血、利胆退黄的功效;姜黄又有____的功效。
【单选题】SECTION 3 Directions: Each passage in this group is followed by questions based on its content. After reading a passage, choose the best answer to each question. Answer all questions following a passa...
A.
explaining the process by which the Earth and its oceans accreted
B.
reporting how recent research has arrived at a new explanation for the constitution of the Earth's oceans
C.
accounting for the chemical composition of the various ingredients of the Earth's oceans
D.
contrasting various competing hypotheses as to what the Earth's oceans consist of
E.
reporting inconsistencies with the result of new research into the composition of the Earth's oceans
【单选题】两零件邻接时,不同零件的剖面线的画法是()。
【多选题】关于光电效应的规律,下列说法正确的是 ...( )
A.
当某种色光照射金属表面时,能产生光电效应,则入射光的频率越高,产生的光电子的最大初动能越大
B.
当某种色光照射金属表面时能产生光电效应,则入射光的强度越大产生的光电子数越多
C.
对某金属,入射光波长必须小于一极限波长才能产生光电效应
D.
同一频率的光照射不同金属,如果都能产生光电效应,则逸出功大的金属产生的光电子的最大初动能也大
【判断题】技能是人们在生活中运用知识经验经过练习而获得的完成某项任务的动作方式或心智活动方式。
【判断题】当光照射某一金属时,如果入射光的频率小于这一金属的红限频率,则无论光强如何,都不会产生光电效应。
【单选题】下列选项中,不属于结构化程序设计的三种基本结构的是: