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【单选题】
抗'O'试验测定的是A.
A族溶血性链球菌的代谢产物
B.
A族溶血性链球菌的溶血毒素
C.
A族溶血性链球菌溶血毒素抗体
D.
溶血毒素的溶细胞毒性
E.
O型链球菌抗体
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【简答题】------- ,无以至千里;--------,无以成江海。
【单选题】According to paragraph 2, evidence from fossils suggests that
A.
extinction of species has occurred from time to time throughout Earth's history.
B.
Extinctions on Earth have generally been massive
C.
there has been only one mass extinction in Earth's history.
D.
dinosaurs became extinct much earlier than scientists originally believed.
【简答题】“不积跬步，无以至千里；不积小流，无以成江海”的名言告诉人们的哲理是（ ）。
【简答题】_____________ ,无以成江海。
【单选题】The hospital opened 5 years ago. It _____ for 5 years. [ ]
A.
opened
B.
opens
C.
has been open
D.
has opened
【单选题】At present , the butter factory is still polluting the river though it _____to stop.
A.
ordered
B.
has ordered
C.
will be ordered
D.
has been ordered
【简答题】已知一个等腰三角形的周长为20cm，若其中一边长为6cm，求另外两边的长．
【简答题】第二篇：C级 Football Football is, I suppose, the most popular in England: one has only to go to one of the important matches to see this. Rich and poor, young and old, one can see them all there, shou...
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