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【简答题】
Read the following the passage carefully and fill in the blanks with the proper words from the list: A. simplification B. together C.single D. combine E. trend F. alloy G. crankcase H. construction I. origins G.rigid It has long since been established practice to (1) the cylinder block and crankcase into a ( 2) unit, this generally bèing termed "monobloc" construction. The historical (3) of this form of construction date back to the early 1920s, when there was a general (4)towards (5 ) of the engine structure. Until then the cylinder block and(6) were produced as separate units, in cast iron and aluminum ( 7) respectively, and then bolted (8 ). In relation to modem engine design, the monobloc (9) provides a very necessary (10 ) foundation for the engine and reduces manufacturing costs.
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【简答题】4+6= 6.4÷0.= 0.78÷0.1×100= 100-0.1= 12.4×5= 1.6-1.2÷4= 3.6+6.4-3.6+6.4= 0.25×8= （12.5-1.25）×0.8=
【简答题】根据《出入境检验检疫机构实施检验检疫的进出境商品目录》，须实施出口食品卫生监督检验的商品，其商品编码对应的“检验检疫类别”应包含代码（ ）。[2007年第二次考试真题]
【单选题】4×3.6+ 0.8×3×6.4 =2.4×3.6 +2.4×6.4= 2.4×(3 6+6.4)=24计算过程运用了 [ ]
A.
乘法结合律
B.
乘法分配律
C.
乘法结合律和乘法分配律
【简答题】已知一条曲线上任一点处的切线的斜率等于该点横坐标的倒数，又知曲线过点(1，2)，求该曲线的方程，
【单选题】根据《出入境检验检疫机构实施检验检疫的进出境商品目录》，须实施出口食品卫生监督检验的商品，其商品编码对应的“检验检疫类别”应包含代码。 （ ）
A.
M
B.
Q
C.
R
D.
S
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