内容正文:
高三英语语法填空提升练
第一篇
SHENZHEN -- Chinese researchers have completed a digital genetic variation map of rice based on more than 10,000 rice samples, 1 ____ (provide) a new tool for further study of natural rice variations, 2 _____ (especial) rare variants.
Rice is one of the world's 3 (important) staple foods and crops. Its natural variation provides a key genetic basis for its possible genetic modification and modern breeding.
"The latest research result 4 _____ (be) like a 'digital map' for research on rice, offering clear guidance on its breeding," said Shang Lianguang, a researcher from the Agricultural Genomics Institute at Shenzhen (AGIS) under the Chinese Academy of Agricultural Sciences.
5 ______ the help of this map, the researchers have corrected errors in the classification of some indica and japonica rice varieties, extensively 6 ____ (analyze) the population frequencies of important 7 ____ (function) genes in different rice subpopulations and identified excellent natural variations among them.
8 _____ (Base) on the map, they also established an online database platform for global users, providing relevant scientific 9 _____ research services for studies on rice.
This research result 10 _____ (publish) in the journal Nucleic Acids Research.
第二篇
Many people still remember the magic of Father Christmas from 1._____ they were children. As parents, they try to keep that magic alive for their children for as long as they can.
That is why Letters from Father Christmas could be the perfect book for those 2._____ regard Christmas2._____ a special time of year. The man who wrote these letters is one of the most famous names in English literature—J.R.R. Tolkien, author of The Lord of the Rings. The letters were Tolkien’s way 3._____ keeping Father Christmas alive for his four children, over a period of more than twenty years.
Every Christmas, an envelope with a North Pole stamp arrived. It 4._______(address) to T