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（10分）求过直线 与 的交点，且平行于直 线 的直线方程。
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【单选题】听力原文： The key question for any only child is this: why were you an only child? It's a key question for at least two reasons. If your parents had wanted several children but could have only you, they a...
A.
Those who are themselves spoiled and self-centered.
B.
Those who expected to have several children but could only have one.
C.
Those who like to give expensive jewels to their children.
D.
Those who give birth to their only children when they are below 30.
【简答题】右图曲线表示各类遗传病在人体不同发育阶段的发病风险，请分析回答
图中多基因遗传病的显著特点是（）。21三体综合征属于（）遗传病，其男性患者的体细胞的染色体组成为（）
【单选题】听力原文： The key question for any only child is this: Why were you an only child? It's a key question for at least two reasons. If your parents had wanted several children, but could have you only, they ...
A.
Those who are themselves spoiled and self-centered.
B.
Those who expected to have several children but could only have one.
C.
Those who like to give expensive jewels to their children.
D.
Those who give birth to their only children when they are below 30.
【单选题】下列四种多基因病中，患者同胞发病风险最高的是
A.
遗传率 76% ，人群发病率 0.4%
B.
遗传率 32% ，人群发病率 0.1%
C.
遗传率 32% ，人群发病率 0.4%
D.
遗传率 76% ，人群发病率 0.1%
【单选题】Decide which of the following best states the author’s purpose of writing. (Is an Only Child a Lonely Child?)
A.
To point out the disadvantages of having only one child.
B.
To display the advantages of having only one child.
C.
To raise a controversial problem with its probable causes and effects.
D.
To list some reasons for having an only child.
【简答题】下图曲线表示各类遗传病在人体不同发育阶段的发病风险，请分析回答问题。 图中多基因遗传病的显著特点是（）21三体综合征属于（）遗传病，其男性患者的体细胞的染色体组成为（）
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