【单选题】Why does the author mention 'aragonite' in line 26
A.
To explain why fossils are rare
B.
To compare aragonite fossils and calcite fossils
C.
To argue that certain fossils are more informative than others
D.
To illustrate the kinds of inorganic hard parts that can form. fossils
【简答题】学习JS的小案例 比照代码截图,编写相应JS代码。
【单选题】According to the passage, who are the first immigrants in America?
B.
The Asian descendents.
【简答题】在下列关于趋势线的陈述中,正确的陈述有( )。
【单选题】The first immigrants in American history came from
A.
England and the Netherlands.
【单选题】在写作总结时,应当着重强调的精华和重点部分是( )
【判断题】FR-E740变频器多段速可以组合成3档转速
【判断题】严格控制药物入量,告知家属不可私自调节滴速
【简答题】数字万用表可以测量流过电阻 的 、电阻两端的 及电阻值。
【单选题】数字万用表可以测量流过电阻的( )、电阻两端的( )及电阻值