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搜题
【判断题】
氨基甲酰磷酸既可以合成尿素也可以转变为嘌呤核苷酸。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】What can be inferred from the story?
A.
Many people in the city have mobile phones.
B.
The thief would rather pick up six years of hard labor.
C.
The thief would have escaped being caught if he hadn't sold the stolen phone.
D.
The two teenagers set the unique ring on purpose.
【单选题】With the development of technoledge, ____ mobile phones have more functions, rather than _____ means of communication.
A.
/; a
B.
/; the
C.
the; /
D.
a; /
【单选题】Mobile phones have become an____part of our lives.
A.
dispensable
B.
indispensable
C.
necessary
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