小明在“观察人体口腔上皮细胞”的实验中,染色前进行了第一次观察,染色后进行了第二次观察,如图所示。下列有关叙述正确的是( )
A:吸水纸的主要作用是吸除滴管滴加的多余液体,以免污染镜头
B:第一次观察时适当使用较小的光圈和平面镜,有利于观察细胞结构
C:第二次观察时可以看到细胞质中很清晰的红色大液泡
D:为了节约实验时间,安放临时装片后就使用较长的物镜观察
“民以食为天;农业稳,天下稳;农民安,天下安”,自从新中国成立以来,我党和政府时时刻刻关心着农民,关注着农业,在时代的不断发展变化中,党和政府与时俱进,不断调整农业政策,有错必纠。这样,才使得我国农业在希望的田野上茁壮成长。
请回答以下问题:
have, but, waitress, with, what, write, actress, weekends
Jodie doesn't like her job. She is a ____. She____to work in the evening. She has to work on____. She is always busy. She doesn't want to work in a restaurant. It's boring.
She wants to be an ____. She likes to sing and dance. She likes to work ____ other young people. She wants to be in the pop play. She wants to be known by many people.
____ now she can only work in the restaurant. She is very unhappy every day.____ can she do? Can you help her?____a letter to her soon.