Heilongjiang province is a barn (粮仓) of China. It has rich 1 for plants to grow. The farmers sow (播撒) seeds (种子) in spring and have a harvest in 2 .
Do you know that a seed has its 3 identity card (身份证)? In our country, there is a seed 4 in Beijing. It collects all kinds of seeds from 5 places. When seeds first come in, they each get a number for 6 “physical examination”. Some workers put all kinds of seeds 7 different farms together. Then, they divide them into 8 according to the seeds’ looks. Next, workers check the seeds to 9 sure they’re healthy. A worker at the seed bank showed a seed that had a large insect 10 it. “A seed like this should not be 11 ,” he said.
After that, workers test the good ones, they use the results to predict their 12 . They dry and weigh the best seeds after several 13 . Next, they keep the seeds 14 in a fridge at -18℃. With all these done, the seeds now have their identities. It is a good 15 to protect the safety of plants. Even though there is a natural disaster on the farm, the seeds won’t die out.
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