
【名词&注释】
水杨酸(salicylic acid)、青霉素(penicillin)、氯霉素(chloramphenicol)、藻类植物(algae)、单细胞(single cell)、输导组织(conducting tissue)
[单选题]下列各种输导组织(conducting tissue)特征中,( )的性状最为进化.
A. 具网纹、孔纹导管
B. 具环纹、螺纹导管
C. 无导管而具管胞
D. 无伴胞
查看答案&解析
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举一反三:
[单选题]What documentation should a couple with a 7-year-old child carry when they drive a car from Canada to America?
A. A BC driver’s license, an Air NEXUS card, and a birth certificate.
B. An Air NEXUS card, a U.S. Coast Guard Merchant Marine Document, and a birth certificate.
C. Two vaild passport crads and a certified copy of a birth certificate.
D. A NEXUS card, a U.S. Coast Guard Merchant Marine Document.,and a certified copy of a birth certificate.
[单选题]根据下面,回答 57 ~ 60 题: EIt's only 4 hours flying time from Sydney, but a world away. What better place to rest than a country where the only place people hurry is on the football field and things are done in "Fiji time"?
A. Here you'll find the capital Suva and the international airport at Nadi Vatoa, on the other hand, is a tiny island in the farthest part of Hiji. Then there are 331 other islands, many of them with places to stay.
B. With less than a million people living on islands, you'll never feel crowded And with a climate(气候)that changes only for five degrees between seasons, there’s never a bad time to come.
D. Whenever you come , wherever you go ,you’re sure to see some unforgettable events , From war dances to religious (宗教的) songs. From market days to religious days. It's not just staged for tourists; it's still a part of everyday life in Fiji And any one of us can enjoy Fiji's spirit by being part of the traditional (传统的) sharing of yaqona—a drink made from the root of a Fiji plant
E. So why not join us for the experience of a lifetime?
F. 第17题:Where is the international airport of Fiji?
G. In Suva
H. In Sydney
I. On the island of Vatoa
J. On the island of Viti Levu
[单选题]藻类植物都是单细胞(single cell)或群体。( )
A. 正确
B. 错误
[单选题]分子中含有某些不稳定基团,可发生水解的物质( )。
A. 对乙酰水杨酸
B. 青霉素
C. 氯霉素
D. 三者都是
E. 三者都不是
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