问题
选择题
种群基因频率总是在不断变化的原因包括
①突变 ②基因重组 ③自然选择 [ ]
A．①②
B．②③
C．①③
D．①②③
答案
答案：D
搜题请搜索小程序“爱下问搜题”
种群基因频率总是在不断变化的原因包括
①突变 ②基因重组 ③自然选择 [ ]
A．①②
B．②③
C．①③
D．①②③
答案：D
| 阅读理解。 | ||||||||||||||||||||||||||||||
Mascota(吉祥物)for the Olympic Games
| ||||||||||||||||||||||||||||||
| 1. From the information above, we know the Olympic Games is held every _____ years. | ||||||||||||||||||||||||||||||
| A. 3 B. 4 C. 5 | ||||||||||||||||||||||||||||||
| 2. The mascots for Beijing Olympic Games are 2 more than those for _____ Olympic Games. | ||||||||||||||||||||||||||||||
| A. Sydney B. Los Angeles C. Atlanta | ||||||||||||||||||||||||||||||
| 3. The mascot for the_____Olympic Games was the first Olympic mascot in Olympic history. | ||||||||||||||||||||||||||||||
| A. 1996 Munich B. 1984 Beijing C. 1972 Munich | ||||||||||||||||||||||||||||||
| 4.The 23rd and 26th Olympic Games were held in the same _____. | ||||||||||||||||||||||||||||||
| A. town B. city C. country | ||||||||||||||||||||||||||||||
| 5. Which of the following information is NOT true? | ||||||||||||||||||||||||||||||
| A. The 1996 Olympic Games was held in America. B. The 27th Olympic Games was held in Europe. C. Beijing is getting ready for the 29th Olympic Games. |
