加减

The purpose is to inspect the grade differences on time of mental addition and mental subtraction of pupils from three grades as well as grades differences of arithmetic time and integration time. The results show that mental arithmetic time of pupils from Grade 2, 4 and 6 decreases with the increase of grades.In the non-carry mental addition of 1-digit number and multi-digit number, menta...

研究结果表明，2、4、6 年级小学生口算时间随年级的增高而减少；在一位数加多位数不进位加法口算中，口算时间差异主要源于运算时间差异和整合时间差异；在一位数加多位数进位加法口算中，口算时间差异源于运算时间差异；在多位数减一位数不借位减法口算中，运算时间年级差异不显著，而整合时间存在显著的年级差异；在多位数减一位数借位减法口算中，口算时间的年级差异主要表现为运算时间的差异，而整合时间差异不显著。

Op1 + op2 The addition operator will add two numbers. op1 - op2 The subtraction operator will subtract two numbers. op1 * op2 The multiplication operator will multiply two numbers. op1 / op2 The division operator will divide two numbers. op1 % op2 The modulus operator will return the remainder of the division of two integer operands. op1 xx op2 The exponentiation operator will raise op1 to the power of op2.++op1 The pre-increpment operator will increase the value of op1 first, then assign it. op1++ The post-increment operator will increase the value of op1 after it is assigned.--op1 The pre-decrement operator will decrease the value of op1 before it is assigned. op1-- The post-decrement operator will decrease the value of op1 after it is assigned.

op1 + op2 对两个数值做加法操作 op1 - op2 对两个数值做减法操作 op1 * op2 对两个数值做乘法操作 op1 / op2 对两个数值做除法操作 op1 % op2 求两个整型数值的余数 op1 xx op2 求幂操作：求 op1 的 op2 次幂++op1 前加操作： op1 的值先增加，然后将值赋给自身 op1++后加操作： op1 的值先赋给自身，再增加值--op1 前减操作： op1 的值先减少，然后将值赋给自身 op1—后减操作： op1 的值先赋给自身，再减少值

In this model, the vehicle acceleration and deceleration rules are analyzed in detail, thus improve the model comparing with previous models which oversimplify the vehicle acceleration or deceleration process.

在车辆变速模型部分，详细的分析了车辆在运行过程中的加、减速度变化规律，弥补了以往对车辆运行过程中的加、减速度变化规律考虑不够细致的缺陷。

The loading program, by which the load can be directly applied to the internal force influence surface, is generated and used to get the result of loading on the influence surface. Through comparing the result of loading on the internal force influence surface of assembly skew hollow slab bridge with the one of the perpendicular bridge, the reduction factor method is offered and its corresponding reduction factor can be obtained.

编制了内力影响面加载程序实现对内力影响面的直接加载；在此基础上，通过参数分析，对比装配式正交空心板桥和斜交空心板桥内力影响面加载的结果，提出斜交空心板桥设计计算的折减系数法，并给出相应的折减系数。

After the unrated player chooses a rated player on the ladder and arranges with him/her an Initial Rating Match: a if the unrated player wins 3-0, he/she will receive the rating of the rated player plus 50 points; if wins 3-1 plus 25; if wins 3-2 plus 10; c if the unrated player loses 2-3 he/she will receive a rating 50 points lower then the rated player but not below the rating of the lowest player on the ladder; if 1-3 he/she will receive a rating 100 points lower then the rated player but not below the rating of the lowest player in the ladder; if 0-3 he/she will receive a rating 200 points lower then the rated player but not below the rating of the lowest player in the ladder.

在未积分参赛者从已积分参赛者中选出一人并安排与其进行一场初始排名赛后：（1）如果未积分参赛者以3比0获胜，其将获得对手积分加50分；若以3比1获胜，则获对手积分加25分；若以3比2获胜，则获对手积分加10分；（2）若未积分参赛者以2比3落败，其将获得对手积分减50分，但不低于进阶赛最低参赛者的积分；若以1比3落败，其将获得对手积分减100分，但不低于进阶赛最低参赛者的积分；若以0比3落败，其将获得对手积分减200分，但不低于进阶赛最低参赛者的积分； 27、初始积分赛的结果对于被挑战的已积分参赛者的积分不产生影响。

When the gas flux is constant, the ratio of reduced resistance is improved with the increase of the water stream velocity. However, the relationship between the gas flux and the ratio of reduced resistance is more complex. When the water stream velocity is constant, if the gas flux is small in contrast, the effectiveness of reduced resistance is not obvious. But when the gas flux increased, the jetted gas will form """"archform"""" which will augment the shape resistance. In this condition, resistance could not be reduced and could even be increased, if the gas flux continues to be increased. So that there needs setting a baffle called step, which introduces the jetted gas into the turbulence boundary layer. In this case, the shape resistance may be fairly great. Besides, the waterline of model has also some effect on the ratio of reduced resistance, which acts on the size of wave. If waterline is deep, the wave could not affect the deployment of microbubble layer, so there is almost no effect on ratio of reduced resistance. However, the wave would affect distributing of microbubble layer under the model so that the gas could leak out from the two sides of model and directly affect the ratio of reduce resistance if the waterline is very small. Whether installing the dashplate or not has also the great influence on the effectiveness the ratio of reduced resistance. From the results of experiment, conclusion is that adding dashplate will greatly improve the effectiveness of reduced resistance.

当喷气量一定时，水流速度增大，减阻率提高；喷气量与减阻率之间的关系比较复杂，速度一定时，如果喷气量较小，减阻效果就比较差，但当喷气量增大的话，喷射出的气体就会形成一个&拱度&，增加了船模的形状阻力，在这种情况下最好采取断阶喷气，把气体引入到湍流边界层中，在这种情况下，船模的形状阻力比较大；船模的吃水对减阻率也有一定的影响，主要表现在波浪大小上，如果吃水较深，波浪影响不到微气泡层的分布，对减阻率不会造成太大影响，如果吃水较浅，波浪就会影响到微气泡层在船模底部的覆盖情况，可能会有部分微气泡从船模两侧泄漏，这样就直接影响到了减阻效果；是否安装压浪板，对减阻率也有较大的影响，从试验结果可以看出，在船模尾部加设了压浪板时，减阻效果明显得到改善。

When at bussiness state, it is impossible or very hard to add or remove a vehicle in the unit, but in some case, it is convenient to add or remove a unit in the entile train.

在运营状态下，单元内的车辆不能或很难加减，但在一定条件下可以比较方便地增减单元。

To observe the clinical effects of "Jiuwei Qianghuo Decoction " in the treatment of leukoderma , 21 cases were treated by oral Decoction and e xternal application of lotion for 3 courses with one month in a course.

观察九味羌活汤治疗泛发性白癜风的临床疗效， 21例患者采用内服九味羌活汤，外用加减羌活汤酊，以1个月为1个疗程，共治疗3个疗程。

I was lucky to drive the car freely on the windy road and enjoyed doing the sporty +/- shifting gears for a lot of time. It was fun to drive and expect the car to follow my command. The car twisted with the sharp bends and travelled at high speed without any drama at all. For the rest of my highway travel, I just left the gear to "D" for fuel economy and smooth run.

在测试的路上没有很多的车辆，以致可以让我常常采用六前速的加减浪段，驾驶真的有乐趣，而当X3穿越众多急弯时，它的上乘表现丝毫不会令人失望，其余的时间，我只让它停留在&D&波段。

If we add and subtract 180-degrees/days from our smaller square running March to March, we will find that our two-year square begins and ends at the Autumnal Equinox.

如果我们加减从我们的小广场180-degrees/days运行3至3月，我们就会发现，这两年方开始并在秋分结束。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。