问题
选择题
在人工饲养条件下，如果淡水鱼不排卵，可将同种性成熟的垂体提取液注射到雌鱼体内，促进其排卵。这一方法主要是利用了垂体细胞合成的[ ]
A．甲状腺素
B．雌激素
C．促甲状腺素
D．促性腺激素
答案
答案：D
搜题请搜索小程序“爱下问搜题”
在人工饲养条件下，如果淡水鱼不排卵，可将同种性成熟的垂体提取液注射到雌鱼体内，促进其排卵。这一方法主要是利用了垂体细胞合成的[ ]
A．甲状腺素
B．雌激素
C．促甲状腺素
D．促性腺激素
答案：D
| 用所给词的正确形式或汉语提示填空 |
| 1. My father________(be)an English teacher. 2. Today is her________(nine)birthday. 3. His daughter  is only one _______(year)old.4. Do you want_______(go)to a movie? 5. Miss Gao, these are _______(me)parents. 6. His sister lost her ID card.She is very______(伤心的). 7. That comedy is_______(真正地)funny. 8. _______(十二月)is the last month of the year. 9. We think Jackie Chan is a very_______(成功的)actor . 10. Are my_______(钥匙)on the dresser? |