A Mendelian dihybrid cross involves one gene and two different alleles.

A、stone

B、arrow

C、shot

D、gun

翻译练习（一） Deng Xiaoping’s scientific concept of “one country, two systems” was advanced in light of Taiwan’s realities. It both upholds China’s state sovereignty and takes into full account the specific conditions of Taiwan. According to the concept of “one country, two systems”, two systems will be practiced within the sovereign state of the People’s Republic of China. On the premise of one China, the main body of the country will practice the socialist system, while the existing capitalist system and way of life in Taiwan will remain unchanged for a long period of time. This concept is highly flexible in that it both gives full expression to the principle of bringing about China’s reunification and upholding its sovereignty and takes into full consideration the history and realities of Taiwan. To practice “one country, two systems” will facilitate the reunification of China, the rejuvenation of the Chinese nation and peace and development in the world. The concept has been warmly received by the Chinese people both in China and overseas and by the world public opinion. Guided by the basic guideline of “one country, two systems” and related policies, major progress has been made in the across strait relations. The across strait exchanges in personnel, scientific, cultural and sports fields have maintained a strong momentum, and the across strait economic exchange has greatly benefited both sides. All this shows the strong vitality of the concept of “one country, two systems”. Taiwan’s future lies in its reunification with the motherland, and attempt to split China will never be accepted as an alternative. Li Denghui and a small number of people in Taiwan who betray the principle of one China and advocate the creation of “two Chinas” or “one China, one Taiwan” in an attempt to split China are doomed to failure as they will surely run into the firm opposition of the entire Chinese people including the people of Taiwan. To accomplish China's reunification is the trend of the time and common aspiration of the entire Chinese people across the Taiwan Strait. With the joint efforts of the entire Chinese people including the compatriots in Taiwan, the day will certainly come when China is reunified.

B、other one

C、another

D、other