如果客体较复杂,活动任务多,则注意的范围就
A.较广
B.不变
C.狭窄
D.极广
参考答案:C
The sentence "It's up to you" means "You are the person who ______."
A.makes the decision
B.is responsible
C.has the fight
D.is confident
(1)光合作用______ A.乌贼在遇到敌害时,喷墨汁逃跑
(2)呼吸作用______ B.家燕在屋檐下筑巢
(3)防御行为______ C.吸收二氧化碳,放出氧气
(4)生殖行为______ D.学生听到上课铃声,立即走进教室
(5)条件反射______ E.分解有机物,释放能量.