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英语语法专项习题 - 名词 ( ) 1 She was very happy. She_____in the maths test. A. makes a few mistake B. made a few mistakes C. made few mistakes ( ) 2 We need some more____. Can you go and get some, please? A. potato B. potatos C. potatoes ( ) 3 _____are____for cutting things. A. Knife/used B. Knives/used C. Knife/using ( ) 4 What big____ the tiger has! A. tooth B. teeth C. tooths ( ) 5 Please remember to give the horse some tree___. A. leafs B. leaves C. leaf ( ) 6 -Can we have some ___? -Yes, please. A. banana B. oranges C.apple ( ) 7 On the table there are five____. A. tomatos B. piece of tomatoes C. tomatoes
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【单选题】按一般光度法用空白溶液作参比溶液,测的某试液的透射比10%,如果更改参比溶液,用一般分光光度法测得透射比为20%的标准溶液作参比溶液,则试液的透光率应等于( )。
A.
0.08
B.
0.4
C.
0.5
D.
0.8
【简答题】若工件在夹具中定位,要使工件的定位表面与夹具的定位元件相接触,从而消除 。
【简答题】It was because I wanted to buy a dictionary ______ I went downtown yesterday. A) but B) and C) why D) that
【简答题】若工件在夹具中定位，要使工件的定位表面与夹具的()相接触，从而消除自由度。
【单选题】按一般光度法用空白溶液作参比溶液,测得某试液的透射比为10%,如果更改参比溶液,用一般分光光度法测得透射比为20%的标准溶液作参比溶液,则试液的透光率应等于( )。
A.
8%
B.
40%
C.
50%
D.
80%
【简答题】工件在夹具中定位，要使工件的定位表面与夹具的（）相接触，消除自由度。
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