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【单选题】
The following paragraph is incomplete. Choose the best sentence to make it complete. Even though Arizona and Rhode Island are both states of the U.S., they are strikingly different in many ways. For example, the physical size of each state is different. Arizona is large, having an area of 114,000 square miles, whereas Rhode Island is only about a tenth the size, having an area of only 1,214 square miles. Another difference is in the size of the population of each state. Arizona has about four million people living in it, but Rhode Island has less than one million. ___________________________________. For example, Arizona is a very dry state, consisting of large desert areas that do not receive much rainfall every year. However, Rhode Island is located in a temperate zone and receives an average of 44 inches of rain per year. In addition, while Arizona is a landlocked state and thus has no seashore, Rhode Island lies on the Atlantic Ocean and does have a significant coastline.
A.
The two states also differ in the kinds of natural environments that each has.
B.
The two states are very similar in natural environments.
C.
The two sates provide different environments for tourists.
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【多选题】以下属于炸制菜肴的特点是( )。
A.
B.
C.
D.
E.
【单选题】受病原菌侵入机体后,出现最早的抗体是( )
A.
IgG
B.
IgM
C.
IgA
D.
IgE
E.
IgD
【单选题】下列说法中,正确的是
A.
强电解质的水溶液一定比弱电解质的水溶液的导电能力强
B.
强电解质都是离子化合物,弱电解质都是共价化合物
C.
强电解质的水溶液中不存在溶质分子
D.
不溶性盐都是弱电解质,可溶性酸和具有极性键的化合物都是强电解质
【判断题】电流由元件的低电位端流向高电位端的参考方向称为关联参考方向。
A.
正确
B.
错误
【单选题】强电解质是在水溶液中能( )的电解质。
A.
全部解离
B.
部分解离
C.
不发生改变
D.
解离平衡
【单选题】下列说法正确的是(  )
A.
溶于水的强电解质,在水溶液中全部电离成离子
B.
强电解质的水溶液导电能力一定比弱电解质水溶液的导电能力强
C.
某物质若不是电解质,就一定是非电解质
D.
难溶于水的电解质一定是弱电解质
【判断题】电流由元件的低电位端流向高电位端的参考方向称为关联参考方向。
A.
正确
B.
错误
【单选题】关于强电解质和弱电解质的说法正确的是
A.
强电解质溶液的导电能力一定比弱电解质溶液强
B.
强电解质的水溶液中不存在分子
C.
弱电解质的水溶液中既存在分子又存在自由移动的离子
D.
因为NH 3 ·H 2 O是弱电解质,所以在AlCl 3 溶液中加入氨水不能制取Al(OH) 3 沉淀
【单选题】下列叙述正确的是
A.
强电解质的饱和溶液导电能力一定强
B.
凡是能导电的物质都是电解质
C.
强电解质在水溶液中的电离过程是不可逆的
D.
强酸溶液的酸性一定强于弱酸溶液的酸性
【判断题】电流由元件的低电位端流向高电位端的参考方向称为关联参考方向。
A.
正确
B.
错误
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