题目

显微镜的使用 （1） 写出显微镜下列编号的结构：（见下图） ⑹ ⑺ ⑻ （2） 使用显微镜要注意的问题：①下图左是显微镜观察某生物装片时的视野，若使视野甲转变成乙，则移动装片时，应向方向移动装片才能达到这个要求。 ② 如下图所示，在一个视野中看一行细胞，此时显微镜镜头的读数是10×和10×，如果此时将镜头换成10×和80×，那么在这个视野中可以看到的细胞数目是个。下图中①和②为物镜长度，③和④为目镜长 根据句意及各题括号中所给的汉语意思，从下面的方框中选取合适的单词或词组，用其适当形式填空。 1．He was _______(激发)only by his wish to help me, and expected nothing in return． 2．The inventor was rewarded by the government for his scientific _______(成就)． 3．These toys are a real _______(便宜货)at such low prices． 4．He has _______(决心)to overcome any difficulties in his study． 5．Please _______(移走)the vase from the table． 6．He found it hard to _______(集中)his thoughts on one thing for longer than five minutes． 7．Is her husband in work or _______(失业)？ 8．His paper _______(包含)no mistake at all． 9．His _______(号召)you to vote against the motion was thoughtful． 10．We _______(打败)Class One in the volleyball match． 11．The school is widely _______(钦佩)for its excellent teaching． 12．She was even less _______(热心地)about going to Spain． 13．My car is not as _______(可靠)as it used to be． 14．I’ll call back at a more _______(方便的)time． 15．A good salesperson has to be _______(有进取精神)in today’s competitive(竞争的)market．