欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

At times the balance in nature is ______ , resulting in a number of possibly unforeseen effects.
A．troubledB．confusedC．disturbedD．puzzled
C
trouble主要指遇上難解決的問(wèn)題而使人苦惱、憂慮；puzzled 指人是困惑的，因此將A、D兩項(xiàng)排除；根據(jù)句意，自然的平衡本身并不是混亂的（confused）,而不受到了人為的干擾（disturbed）,才會(huì)導(dǎo)致不可預(yù)見(jiàn)的影響。因此選擇C項(xiàng)。
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題


With the change of the economic foundation the entire immense superstructure is _____ rapidly transformed.
A．a(chǎn)nything but B．more or lessC．a(chǎn)t largeD．a(chǎn)ny more

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

Mother told Jim to watch the milk until it boiled and then _____ off the gas.?
A．turnB．turningC．turnedD．having turned

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題


______you I owe a thousand apologies  ________ having doubted your ability.
A．For; toB．To; for
C．For; forD．To; to

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

The film “World without thieves” ______ a great success and brought in a large profit to the cinema.
A．a(chǎn)ppreciatedB．enjoyedC．wonD．seized

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

It was already past midnight and only three young men ______in the house.
A．leftB．remainedC．delayedD．deserted

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

Asked suddenly about the matter ,he couldn’t       an answer at once.
A．come up withB．look forC．put up withD．a(chǎn)nswer for

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

The car was completely _____ and the driver seriously injured.
A．broken offB．taken offC．written offD．picked up

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

His aunt’s letters ________ him of those beautiful days when they used to live together in his hometown.
A．call upB．call forC．call onD．call at

查看答案和解析>>

同步練習(xí)冊(cè)答案