【单选题】“取本品5.0g,加水50ml使溶解,加酚酞指示液3 滴与0.01 mol/L氢氧化钠溶液0.6ml,摇匀,溶液应显淡红色。”以上为木糖醇哪一项检查项?
【单选题】骨骼肌兴奋-收缩耦联的中心环节是 ( )
【单选题】The reasons that reporters and writers do research are
B.
A feature writer who is confident of his own knowledge of the story will be taken seriously by his sources and later by his readers.
C.
Research will put the feature writer in the right direction for more necessary information.
【多选题】轮滑运动是一项激烈的体育活动,作为参加轮滑运动的爱好者,应重视对运动损伤的预防,以下哪些措施可以减少运动损伤的发生()
【单选题】葡萄糖中“氯化物”的检查:取本品0.6g,加水溶解使成25ml,加稀硝酸10ml;置50ml纳氏比色管中,加水使成约40ml,摇匀,在暗处放置5分钟,与标准氯化钠溶液(每1ml相当于 10 μg Cl)1ml用同一方法制成的对照液比较,不得更浓。如氯化物的限量要求为0.01%,制备对照溶液时应取标准氯化钠溶液的体积为( )
【判断题】John Smith arrives at the New World to do his research on Indians.()
【单选题】– Has the professor’s talk got____ to do with your present research? – Yes, it has____ to do with my research.
【单选题】中国药典检查氯化钠中重金属的方法如下:取本品 5.0 g ,加水 20 ml 溶解后,加醋酸缓冲液( pH 为 3.5 ) 2 ml 与水适量使成 25 ml ,依法检查,含重金属不得过百万分之二,则应取标准铅溶液( 1 ml 相当于 10 gPb )的体积是