题目内容

心点是视线与视平线的交点。

A. 对
B. 错

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视高是视点的垂直高度，视高一般与视平线同高。

A. 对
B. 错

视距是视点至画面的垂直距离，在视平线上，视距等于目点至心点的距离。

A. 对
B. 错

Part One (paras 1-3):A young husband and father, Albert Einstein had to work hard to ________ his family.

Part Two (paras 4-12):Einstein made astonishing achievements in and thus the field.