查询词典 F.

We consider the existence of positive solutions of second order impulsive boundary value problems by constructing the appropriate homotopy operator and applying the theory of fixed point index in cones. our results contain the conclusion when f ≥ 0 and J_k = 0([6]). Secondly, we discuss multiple positive solutions of the following impulsive boundary

其次，我们在§2.2中讨论了下面的脉冲微分边值问题多正解的存在性在这一部分的讨论中，利用不动点指数理论，在f既非超线性又非次线性的情形下，得到了两个正解的存在性定理，把文[7]的结果推广到脉冲微分边值

Most American car horns honk in the key of F .

大部分美国人的汽车喇叭是按 F键操作的。

Most American car horns honk in the key of F.

大多数汽车喇叭的叫声是用钥匙F发出来的。

Nevertheless, it is established that the sequence of iterates produced by the method of Hooke and Jeeves converges to the unique minimizer of f

然而，确定的是胡克和吉夫斯方法的叠代序列收敛于f的唯一最小值。

If the mass in question is a plumb bob, the horizontal component of f is important

如果所讨论的质量是一摆锤，则重要的是F的水平分量。

If the mass is a plumb bob , the horizontal component of f is important

如果所讨论的质量是一摆锤，则重要的是F的水平分量。

F. For three consecutive years after the use of activity sodium humate in the watermelon, melon, strawberry on the effect of the table below.

f。连续三年使用活性腐植酸钠后，在西瓜、甜瓜、草莓上的效果见下表。

He says he has been working in 100 F heat and 90% humidity all day.

他表示他每天在100 F的热度和90%的湿度下工作。

F. Husain, who lives in exile under threats from extremists for daring to paint Hindu deities in the nude, knows that we have yet to secure the right to free expression.

F。 Husain，因为胆敢将印度大神画为裸体而受到极端分子的威胁于是流亡海外，从这点看，我们仍然不能保护自由表达的权利。

When using a salimeter hydrometer, the measurement should be between 4 and 6 % at 25°C (77°F).

使用盐度计时，25°C (77°F)时的测量值应介于4 到6%之间。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。