[简答题]永久杂种(permanent hybrid)

[填空题]Hybrid corn is not like a hybrid approach to vocabulary in that hybrid corn doesn’t ensure maximum results which the latter ensures.

[简答题]杂种优势(heterosis)

[单项选择]Permanent education is practical because
A. there are no limits at all.
B. there are no age limits.
C. no one is getting really old.
D. no one wants to learn at old age.

[简答题]什么是杂种优势请介绍杂种优势的遗传学理论，你认为这些理论完满吗你的看法如何有人建议用无融合生殖来固定植物的杂种优势，你觉得可行吗为什么(提示：无融合生殖是指植物不通过受精产生胚和种子的生殖方法)

[单项选择]
Whole life is permanent insurance protection that protects you for your whole life, from the day you purchase the policy until you die, as long as you pay the premiums (保险费).
Whole life can be a solid foundation. Upon this foundation you can build a long-term financial plan, because it guarantees lifetime protection for your family or business.
Whole life insurance provides basic insurance protection, plus Mortgage protection, Estate preservation, Retirement funding, Charitable giving, Business needs...
A life insurance agent will help you determine an amount of insurance needed to protect your family or business in the event of your death.
Generally after the first year, the policy begins to increase cash value. The amount of cash value in your policy usually increases every year. This money can be used to help purchase a home, fund a child’s education, add to retirement income, or for any other pu
A. It’s permanent insurance protection from the day you were born until you die.
B. It’s permanent insurance protection that protects you for your whole life, from the day you buy it until you die.
C. It’s insurance protection for your whole family members.
D. It’s income protection insuranc

[单项选择]