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【单选题】
万吨级船不少于四道横舱壁的作用是( )A.
分隔舱容
B.
阻止火势蔓延
C.
保证船舶的抗沉性能
D.
减少自由液面对稳性的影响
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举一反三
【单选题】今有蔗糖( C 12 H 22 O 11 )、 NaCl 、 CaCl 2 三种溶液,它们的浓度均为 0.1mol.l -1 ,按渗透压由低到高的顺序排列是: ( )
A.
CaCl 2 12 H 22 O 11
B.
C 12 H 22 O 11 2
C.
NaCl < C 12 H 22 O 11 < CaCl 2
D.
C 12 H 22 O 11 < CaCl 2 < NaCl
【单选题】今有蔗糖(C12H22O11)、NaCl、CaCl2三种溶液，它们的浓度均为0.1mol.l-1，按渗透压由低到高的顺序排列是：
A.
CaCl2
B.
C12H22O11
C.
NaCl
D.
C12H22O11
【简答题】请用一句话概括下面这则新闻的主要信息。(不超过25个字) 北京商报1月25日消息,中通、申通、韵达、圆通、百世、德邦等中国主要快递物流企业,以及AirCity国际物流集团、辛克物流、丹马士物流、4PX递四方、宏远物流、斑马物流等海内外物流企业联合菜鸟平台发布公告,正式开通国内及全球绿色通道,免费从海内外各地为武汉地区运输社会捐赠的救援物资。该绿色通道面向各地政府、企事业单位、社会团体、公益组织、商...
【简答题】苯乙烯本体聚合应选择______引发剂，乳液聚合应选择______引发剂。本体聚合分段聚合是为了解决______问题。
【单选题】Instead of following the career path designed by his parents, he managed to __________ a successful photographic career for himself.
A.
move on to
B.
make his way
C.
carve out
D.
figure out
【单选题】听力原文： Sydney is situated on the foreshores of one of the most magnificent harbors in the world. It was founded in 1788 and with a population of over 3 million. It is the largest city in Australia. Aut...
A.
About 3 million.
B.
About 4 million.
C.
About 5 million.
D.
About 1 million.
【单选题】Instead of following the career path designed by his parents, he managed to ________ a successful photographic career for himself.
A.
equal to
B.
head for
C.
carve out
D.
put aside
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