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问题 单项选择题

质壁分离和复原实验可以说明或证明下列中的哪项（）①植物细胞的死活；②原生质层的伸缩性比细胞壁的伸缩性大；③当外界溶液浓度大于细胞液浓度时，细胞渗透失水；反之，细胞则渗透吸水；④原生质层具有选择透过性；⑤细胞壁的主要成分是纤维素；

A.①②③④

B.①③④⑤

C.②③④⑤

D.①④⑤

答案

参考答案：A

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Museum of the Moving Image(MMI) (Monday Closed)
As the best museum in New York City and with a balance of hands-on(实际操作的)activities and information, it's the rare bird that can entertain and educate people of different ages. It's a perfect destination for a family trip of a couple

New York Hall of Science(NYHS) (Monday Closed)
Being New York City's only hands-on science and technology center, it is an interactive science museum focused on its audience of children. It has the most hands-on exhibits in an NYC museum, and it's a fun destination for ages 5 and up. Older folks might take great interest in the NASA rockets outside the museum, but don't bother unless you've kids to keep you company.

Queens County Farm Museum(QCFM) (Year-round 7 days a week)
It is an actual farm in New York City and home to animals your kids can feed and a yard full of a climbing plant whose fruit can be made into wine. Good chance to meet sheep, goats, pigs, chickens and cow! The animals are mostly readily accessible to visitors. And the museum sells feed for young hands willing to get licked by sheep and goats.
Pros - Outdoor fun.
Cons - Expensive Festivals, long bus ride, no subway.

Queens Museum of Art(QMA) (Monday and Tuesday Closed) Opened in 1972 to serve as a cultural center for the borough(行政区), it exhibits art by local and international artists. Its best exhibits are on the two World's Fairs, and of course, the Panorama of New York City, a giant, highly detailed diorama(透景画)of all five New York City boroughs.Pros - The Panorama!, great gift shop. Easy subway access. Cons - not much for kids.

 1. The least likely choice for 5-year-old Jack to make among the museums is .
A. MMI
B. NYHS
C. QMA
D. QCFM
2. According to the text, which of the following is NOT true?
A. All the museums mentioned above lie in New York City.
B. No other museum in New York City is better than MMI.
C. Lucky visitors can see grapes in one of the museums.
D. NYHS has the most hands-on activities in America.
3. We can know from the text that .
A. people can visit only one of the museums any time and any day
B. visitors can pay a visit to all the museums by subway
C. there is often a rare bird flying in the sky above MMI
D. the Panorama is, as a matter of fact, a great gift shop
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单项选择题

（）供电且受电变压器容量较大时，也可采用分体箱式变电站。

A.10kV

B.20kV

C.35kV
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