produced 测验EN[pɹəˈdjuːst] [pɹəˈd͡ʒuːst] [pɹəˈdust] [-uːst]
- 问题 1 :
Not long ago, it was difficult to _______ photographs of tiny creatures with every part in focus. [ …] A photo processing technique called focus stacking has changed that. Developed as a tool to electronically combine the sharpest bits of multiple digital images, focus stacking is a boon to biologists seeking full focus on a micron scale.
We have no direct evidence that excystation occurs while the chromatoids are present. The amoeba illustrated in Fig. 27 may be excysting with chromatoids. However, this may also be artificial excystation ________ by fixation.