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【简答题】
将产量高与矮杆产量低的亲本小麦杂交，后代的小麦品种中，仍然有产量高、矮杆产量低的小麦，这种情况在生物学上叫做______．但后代的小麦品种中，也会出现一些产量低、矮杆产量高的新品种，这种情况在生物学上叫做______．如果由你来帮助选育，最符合人们生产要求的是______品种的小麦．
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【简答题】Write a summary according to the following part in less than 100 words. The conception of poverty and what to do about it have changed over the decades. Under Social darwinism the lazy and the ineffic...
【单选题】Choose the best summary of the passage.
A.
1 Churchill became Prime Minister in 1940 because King George VI believed that he had the confidence of the nation. Churchill won the war, but lost the general election afterwards.
B.
2 Churchill had a successful military career. He became Prime Minister because he won the most important battle in Britain’s history. He is considered the greatest Briton because his personality sums up the nation.
C.
3 Churchill came from a famous family and was a soldier and politician. When Churchill became Prime Minister in 1940, Britain was at war. Churchill made speeches that inspired the nation, and led the country to victory. Although he was considered a great military leader, Churchill lost the general election after the war.
【简答题】接触网工工作的电压等级是()kV。
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