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【简答题】
Arrange the following words and phrases in proper order to form sentences. 1.you will agree that,will attract the most selective buyers,when you see our samples,and the high standard of craftsmanship,we think that,the quality of the material used 2. to meet your requirements,for the captioned articles,we shall be only too pleased,to revert to the matter,once our supplies are replenished,though we are at present unable 3. and we look forward to your first order,we would like to,details of which,such as stain-steel knives,you will find in the catalog,our other products,draw your attention to 4. steel forks,at your request,for 500 dozen,we are now quoting you,at $4.00 per dozen,FOB Dalian 5. represent better value,our competitors,are obviously superior in quality,we are well aware that,and therefore,but our products,are quoting at considerably lower prices
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【简答题】计算:(10 ﹣3 ) 3 ÷(10 ﹣9 ) 3 =(     ).
【单选题】真空中,光的速度为()m/s。
A.
3.0x10^7
B.
5.0x10^7
C.
3.0x10^8
D.
5.0x10^8
【单选题】五个中方格内红细胞总数为300,红细胞计数结果为
A.
300万/mm
B.
3.0×10/L
C.
3.0×10/L
D.
3.0×10/L
E.
30万/mm
【单选题】In the bacterial counting experiment using the pour plate method, one student got the results as: The average colony number 10 -1 10 -2 10 -3 2760 295 46 Which number is the correct colony number? (...
A.
2.8 × 10 4
B.
3.0 × 10 4
C.
3.8 × 10 4
D.
4.6 × 10 4
【单选题】效率控制包括销售队伍效率、广告效率、( )和促销效率。
A.
计划效率
B.
谈判效率
C.
分销效率
D.
财务效率
【单选题】离心泵的效率等于()。
A.
机械效率×容积效率+水力效率;
B.
机械效率+容积效率×水力效率;
C.
机械效率×容积效率×水力效率;
D.
机械效率+容积效率+水力效率。
【单选题】离心泵的效率等于()。
A.
机械效率+容积效率+水力效率
B.
机械效率·空积效率·水力效率
C.
(机械效率+容积效率)·水力效率
【多选题】市场效率包括()
A.
生产效率
B.
交换效率
C.
分配效率
D.
产品组合效率
【简答题】效率控制包括销售队伍效率、广告效率、( )和促销效率。A. 计划效率B. 谈判效率C. 分销效率D. 财务效率
【简答题】EDTA的K a 1 、K a 2 、K a 3 、K a 4 、K a 5 、K a 6 分别为10 -0.9 、10 -1.6 、10 -2.0 、10 -2.7 、10 -6.2 、10 -10.3 ,在pH=3.0时,EDTA的主要存在形式为______。
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