如图所示，下列实验是研究液体内部压强特点的是（ ）
答案：D
题目分析：A、载玻片是用显微镜观察东西时用来放东西的玻璃片，然后将盖玻片放置其上，用作观察细胞，故本选项错误；
B、此实验是利用天平来测量烧杯中液体的质量，故本选项错误；
C、本实验是利用玻璃棒的搅拌以促进食盐的溶解速度，故本选项错误；
D、本实验是利用压强计来研究液体内部压强特点，故本选项正确；
所以选D．
点评：本题考查了称量器-托盘天平、压强计、一定质量分数的溶液的配置．这是一道基础题，只要多一份细心，就会多一份收获的．
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