干粘石抹灰，垫层抹完后要用靠尺刮平，木抹子搓平。稍吸水后，在垫层上抹______mm

十进制数-128在计算机中的表示为 【2】 。

（）不属于缺货成本。

A.安全库存成本

B.停工损失成本

C.丢失客户成本

D.紧急购入成本

X线检查对骨折的意义主要是（）。

A.了解受伤机制

B.明确诊断

C.判断骨折预后

D.了解伤情

E.了解骨质密度

室温下，水溶液体系中的化学反应I— + OCl— = OI— + Cl—的反应物初始浓度、溶液中的OH—初始浓度及初始速率间的关系如下表所示：

实验 编号	I—的初始浓度 (mol·L-1)	OCl—的初始浓度 (mol·L-1)	OH—的初始浓度 (mol·L-1)	初始速率v (mol·L-1· s-1)
1	2 × 10–3	1.5 × 10–3	1.00	1.8 × 10–4
2	a	1.5 × 10–3	1.00	3.6 × 10–4
3	2 × 10–3	3 × 10–3	2.00	1.8 × 10–4
4	4 × 10–3	3 × 10–3	1.00	7.2 × 10–4

已知表中初始反应速率与有关离子浓度关系可以表示为v=" k" [I—­]1 [OCl—]b [OH—]c（温度一定时，k为常数）。

（1）为开展实验1，某同学取5mL0.02mol·L-1碘化钾溶液、5mL0.015 mol·L-1次氯酸钠溶液、40mL某浓度氢氧化钠溶液混合反应。则该氢氧化钠溶液物质的量浓度为       ；

（2）实验2中，a="                 " ；

（3）设计实验2和实验4的目的是                                            ；

（4）计算b、c值：b="        " ；c=         ；

（5）若实验编号4的其它浓度不变，仅将溶液的酸碱值变更为pH = 13，反应的初始速率v="                 " 。

In the United States, injuries to passengers involved in automobile accidents are typically more severe than in Europe, where laws require a different kind of safety belt. It is clear from this that the United States needs to adopt more stringent standards for safety belt design to protect automobile passengers better.
Each of the following, if true, weakens the argument above EXCEPT:

A．Europeans are more likely to wear safety belts than are people in the United States.

B．Unlike United States drivers, European drivers receive training in how best to react in the event of an accident to minimize injuries to themselves and to their passengers.

C．Cars built for the European market tend to have more sturdy construction than do cars built for the United States market.

D．Automobile passengers in the United States have a greater statistical chance of being involved in an accident than do passengers in Europe.

E．(E) States that have recently begun requiring the European safety belt have experienced no reduction in the average severity of injuries suffered by passengers in automobile accidents.