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问题 单项选择题

男孩，1岁。精神运动发育落后，小口，小眼睛，下颌短小，低耳位，兔唇，裂腭，四肢张力高，手指屈曲呈紧握状，第3指与第2指相叠，拇指圆大，屈向足背，胸骨左缘3～4肋间有收缩期Ⅲ级杂音，肺动脉瓣区第2音亢进分裂。其可能的诊断是

A．21-三体综合征
B．18-三体综合征
C．13-三体综合征
D．猫叫综合征
E．4P-三体综合征
F．8-体综合征
G．9p-三体综合征
H．10p-三体综合征

答案

参考答案：B

阅读理解

San Francisco has many museums. You can visit one and learn something new. We have art, science, history and other special museums. Some museums are open every day. Some are only open on certain days. Some museums are expensive, and others are free. But some of the expensive ones have free days. Many museums have websites. The websites usually have information about the things you can see in the museums.

On a museum’s website you can get information about ticket prices and free days. You can also know where the museum is and when it is open. Sometimes you have to click on the words like Visit, Information, or About to find the information. That will be hard work for you.

小题1:San Francisco has many museums for you to visit and ______.

A．learn something new

B．play computer games

C．watch the movies

D．click on Information小题2:Some museums in San Francisco are open every day, but some are only open ______.

A．on weekdays

B．on weekends

C．on certain days

D．on holidays小题3:Many museums have ______ with information about the things you can see in them.

A．ticket prices

B．their websites

C．open hours

D．free days
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单项选择题

国际单位制基本单位有（）、热力学温度单位开尔文、电流单位安培、发光强度单位坎德拉、物质的量单位摩尔7个。

A.时间单位秒、长度单位米、质量单位克

B.时间单位秒、长度单位公尺、质量单位公斤

C.时间单位秒、长度单位尺、质量单位斤

D.时间单位秒、长度单位米、质量单位千克
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