A.社會(huì)環(huán)境 B.政治環(huán)境 C.自然環(huán)境 D.家庭環(huán)境
A.充足的睡眠B.適當(dāng)?shù)臓I(yíng)養(yǎng)C.樂觀的情緒D.體育鍛煉
A.1/3B.1/4C.1/5D.1/6