题目内容
（请给出正确答案）
A．It remains unknown yet.
B．Around five thousand years ago.
C．About two million years ago.
D．About three hundred thousand years ago.
安装简答题APP，拍照搜题省时又省心！
更多“A．It remains unknown yet.B．Aro…”相关的问题
A．an object.
B．an attribute.
C．a predicative.
D．a complement.
A.changes over time
B.can be monitored
C.is the same as that in healthy hearts
D.is high enough to replace cells faster than they"re dying off
(It remains) (to see) whether Jim (will be) fit enough (to play) in the finals.
A．It remains
B．to see
C．will be
D．to play
A．It is already so widespread.
B．It is proved to be positively harmful.
C．It proved to be more harmful than tobacco.
D．It is unknown whether cannabis may be harmful or not.
The phrase "indefinite period" in the passage is closest in meaning to a period
A．whose end has not been determined
B．that does not begin when expected
C．that lasts only briefly
D．whose importance remains unknown
What do we know about tsunami？
A.It is a scientific term for seaquakes．
B.It iS a Japanese name for true tides．
C.It is an African word for hurricanes．
D.It is a name of an unknown American scientist．
The reason the author considers "hypothesis" as "a leap into the unknown" is that______.
A．it is not reliable
B．it is a kind of adventure
C．it goes beyond gathered facts
D．it requires too much unrealistic effort to formulate
An unauthorized biography is likely to attract more readers because ______.
A．it portrays the subject both faithfully and vividly
B．it contains interesting information about the subject's private life
C．it reveals a lot of accurate details unknown to outsiders
D．it usually gives a sympathetic description of the subject's character
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
微信搜一搜
简答题
微信搜一搜
简答题
如搜索结果不匹配，请 
