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【单选题】
在 H 3 AsO 3 的稀溶液中通入过量的 H 2 S 得到 As 2 S 3 溶胶,其胶团结构式为A.
[ （ As 2 S 3 ） m · nHS — ] n- · nH +
B.
[ （ As 2 S 3 ） m · nH + ] n+ · nHS —
C.
[ （ As 2 S 3 ） m · nHS — ·（ n — x ） H + ] x- · xH +
D.
[ （ As 2 S 3 ） m · nH + ·（ n — x ） HS — ] x+ · x HS —
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举一反三
【单选题】According to the CISG, if the quantity delivered by the seller is greater thanthatof the contract, the buyer can refuse
A.
all the goods
B.
the excess part of the whole quantity
C.
the quantity stipulated in S/C
D.
the quantity stipulated in L/C
【单选题】The passage states that income available for spending in the U. S. was greater in 1955 than in 1950 by______.
A.
90%
B.
33%
C.
50%
D.
60%
【单选题】法约尔提出管理的五职能或要素是( )
A.
计划、组织、决策、领导、控制
B.
计划、组织、领导、协调、控制
C.
计划、组织、指挥、协调、控制
D.
计划、组织、协调、决策、控制
【单选题】某前壁心肌梗死病人发病第3日疼痛缓解,却突然心慌、憋气、不能平卧,咳出粉红色泡沫痰。查体HRllO次/分,R20次/分,两肺可闻及大量湿罗音,此病人可能发生了
A.
室性心动过速
B.
心源性休克
C.
支气管哮喘
D.
急性左心衰竭
E.
心室壁瘤
【单选题】Which of the following is a reason for the pressure for greater protectionism that occurred during the 1980s and early 1990s?
A.
The U.S. Congress erected an enormous wall of tariff barriers.
B.
Japanese economic failure strained the world trading system.
C.
The persistent trade surplus in the United States strained the world trading system.
D.
Many countries found ways to get around GATT regulations.
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