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【单选题】
[单选题] 测量值与真实值之差称为( )A.
相对误差
B.
绝对误差
C.
系统误差
D.
偶然误差
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举一反三
【单选题】_______ from the top of the building when the policeman pointed the gun at him.
A.
Jumped down the robber
B.
Jumped the robber down
C.
Down jumped the robber
D.
Down the robber jumped
【单选题】下列关于细胞与生命活动的叙述,错误的是
A.
病毒不具有细胞结构，所以它的生命活动与细胞无关
B.
生命活动离不开细胞
C.
细胞是生物体结构和功能的基本单位
D.
多细胞生物依赖高度分化的细胞密切协作，才能完成生命活动
【单选题】______ from the tenth floor when the policeman pointed his pistol at him.
A.
Jumped down the burglar
B.
Down the burglar jumped
C.
The burglar jumped down
D.
Down jumped the burglar
【单选题】下列关于细胞与生命活动的叙述,错误的是
A.
生命活动都离不开细胞
B.
病毒不具有细胞结构，所以它的生命活动与细胞无关
C.
细胞是生物体结构和功能的基本单位
D.
多细胞生物依赖高度分化的细胞密切合作，才能完成生命活动
【单选题】下列关于细胞与生命活动的叙述，错误的是
A.
酵母菌、海豚等生物的单个细胞能完成各种生命活动
B.
生物的遗传和变异以细胞内基因的传递和变化为基础
C.
HIV病毒没有细胞结构，必须依赖宿主细胞才能增殖
D.
“望梅止渴”这一生命现象的发生需要神经细胞的参与
【单选题】How did the author feel when he jumped into the water?
A.
He felt helpless and hopeless when he jumped into the water.
B.
He imagined that he was the little boy drowning in the water.
C.
He felt like he was back in that pool, and was paralyzed with fear.
【单选题】When George jumped into a car, his dog ______.
A.
jumped out of the next one
B.
jumped into another car
C.
stayed beside another car
【单选题】What is the boy's first response when Jason grabbed him?
A.
The boy listened to Jason's order, and was still.
B.
The boy popped back up, eyes wide with terror, pawing and twisting against Jason.
C.
The boy was breathless and lost his consciousness.
D.
The boy was battered by vicious waves.
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