在夫妻双方没有约定时，婚姻关系存续期间所得的下列财产中属于夫妻共同财产的是（）。

［A］ lab technicians may be affected by chemicals

［B］ cats and dogs in the lab may die of diseases

［C］ experiments may waste lots of lives

［D］ cloned animals could outlive the natural ones

A．某甲与某乙、某丙与某丁的婚姻均有效

B．某甲与某乙、某丙与某丁的婚姻均无效

C．某甲与某乙的婚姻均无效，某丙与某丁的婚姻均有效

D．某甲与某乙的婚姻均有效，某丙与某丁的婚姻均无效

A．保证劳动者充分就业

B．使劳动者生活水平不断提高

C．保证人们最基本的生活需要

D．实现共同富裕

［A］ rich people are more interested in cloning humans than animals

［B］ cloning of animal pets is becoming a prosperous industry

［C］ there is no distinction between a cloned and a natural dog

［D］ Missy’s master pays a lot in a hope to revive the dog

［A］ human cloning will not succeed unless the technique is more efficient

［B］ scientists are optimistic about cloning technique

［C］ many people are against the idea of human cloning

［D］ cloned animals are more favored by owners even if they are weaker