11. 動物蒸發(fā)散熱只使周圍濕度加大而不提高溫度稱為(      )

A. 濕熱                                                          B．潛熱

C. 散熱                                                          D．顯熱

12．雛鵝開始第二次換羽的時間是(      )

A. 80日齡左右                                               B．90日齡左右

C. 60日齡左右                                                D．100日齡左右

13. 蛋用雞采用人工授精的繁殖方式時，對處于盛產(chǎn)期的母雞一般一周輸精(      )

A. 7次                                                            B．5次

C. 3次                                                            D．1次

14．豬的繁殖力高，理論上兩年可產(chǎn)(      )

A. 5胎                                                            B．6胎

C. 7胎                                                            D．8胎

15. 對哺乳仔豬補料的選擇應以以下哪種類型的飼料為宜? (      )

A. 偏酸性或堿性低                                        B．堿性

C. 酸性                                                          D．強堿性

16．通常乳用犢牛的哺乳期為(      )

A．1—2個月                                                        B．3—4個月

C．5—6個月                                                  D．7—8個月

17．摩拉水牛原產(chǎn)于(      )

A．印度                                                         B．泰國

C．越南                                                         D．中國

18. 細毛羊每年的剪毛次數(shù)一般為(      )

A．1次                                                          B．2次

C．3次                                                          D．4次

19．母羊泌乳的高峰期是產(chǎn)后(      )

A．30天                                                               B．30~45天

C．60~90天                                                   D．90~210天

20．仔兔適宜的斷奶方法是(      )

A．移走母兔                                                  B．移走仔兔

C．母、仔兔均移出                                        D．交換母兔