题目内容

While studying he was financially dependent （）his wife.

A. to
B. of
C. on
D. from

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罗伯特·范茨采用优先注视技术对婴儿研究，结果表明婴儿从出生起就表现出明显的（）。

A. 客体永久性
B. 深度知觉
C. 视觉偏好
D. 颜色偏好

You should save your work often as a（）against computer failure.

A. sanction
B. precaution
C. shield
D. shelter

由于看见成人给小孩洗澡，一些儿童也给自己买来的玩具娃娃洗澡，这是思维活动的（）。

A. 直观动作性
B. 抽象概括性
C. 具体形象性
D. 间接概括性

Stone does not（）, and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.

A. crack
B. decay
C. destroy
D. crush