查询词典 B-S

We have summarized the recent progress in studies of the regioselectivity for the P-B reaction in this paper, and especially focused on the temperature and substituent effects on the regioselectivity.

本论文结合作者的研究工作，评述了近年来P-B反应的区域选择性的研究进展，重点阐述了反应温度、反应物的取代基对P-B反应区域选择性的影响及其规律。

To suit her elegant manner to fill out an application form to substitute A for B to feel more comfortable with oneself to take sth.

与她的优雅举止相配 2。填写申请表 3。用A代替B 代替B 4。自己感到好多了 5。认真对待某事 6。

In this paper we separate the Hamiltonian into three parts: a spherical symmetry Hamiltonian; a z-component of the angular momentum operator, and a non-spherical symmetric potential as the perturbation operator, and provide a propose method by separating the potential containing squared magnetic field B^2 into two parts spherical symmetric and non-spherical symmetric ones so that the first-order energy correction due to the non-spherical symmetric potential is zero, and the second-order correction due to B^2 can be obtained by a simple variational method.

采用变分法和微扰法相结合的方法，把高强度磁场中氢原子的哈密顿H分为三部分：球对称哈密顿；z分量角动量算符相应部分和非球对称势微扰，并用一种特别规定的分解法将哈密顿H中含磁场平方项的势能分解为球对称与非球对称两部分，且使非球对称部分引起的一级修正能量值为零，并采用一种简便的变分法直接求出B^2对能级的二级修正值。

Reactions of 5-amino-lH-pyrazoles with aromatic and aliphaticα-bromoacetophenones, followed by acid-mediated iminative cyclization and the ensuing tautomerization, produced methylthio-imidazolo[1,2-b]pyrazoles 6a-6g.

咪唑并[1，2-b]吡唑甲硫醚类化合物经过室温下H_2O_2/CH_3COOH温和氧化，得到咪唑并[1，2-b]吡唑甲基亚砜类化合物7a-7g。

Q: In stroke play, B, who was As fellow-competitor and marker, refused to sign As score card on the ground that A has played outside the teeing ground at the 15th hole. A claimed that he played from within the teeing ground.

问：在比杆赛上，B是A的同组球员，也是记分员。B认为A在第15洞发球区外打球，所以当场拒绝签A的比分卡。A认为自己是在发球区内打的球。

Coffee offers significant amounts of riboflavin (11% RDA) and B-5 vitamin (6% RDA), as well as thiamin, niacin , potassium and other essential vitamins and minerals.

咖啡可提供大量的核黄素(每日建议摄入量的百分之十一)和维生素B-5，还含有维生素B-1，烟酸以及钾和其它基本维生素和矿物质。

Results The average value of the hearing threshold was 70.67±20.43 dB HL in group A and 67.58±36.18 dB HL in group B(P＞0.05)before treatment.The average value of the hearing threahold reduced to 30.09±20.43 dB HL in group A and 18.42±18.05 dB HL in group B(P＜0.05) after treatment.

结果 治疗前A组和B组的平均听阈分别为70.67±20.43 dB HL和67.58±36.18 dB HL(P＞0.05)，治疗后两组听力平均提高分别为30.09±20.43 dB和18.42±18.05 dB(P＜0.05)。

In 1989 Tillie Fowler a Republican, became the first member of her party to serving as A B C president of the city council of Jacksonville, Florida.

D key：B 分析：第一步分析空前后的关系，发现B前面是to，所以这里应该用动词原形才对。

The detailed processing and analysis of the experimental results indicate that the color discrimination characteristics of human eyes are different for individual color regions and directions in the a*-b* plane,and namely the CIE1976 a*-b* plane is visually non-uniform. The visual color tolerance in the third and fourth quadrants is smaller than the first and second quadrants, the biggest tolerance is in the region of high chroma orange, and the smallest is in blue.

通过对实验数据的详细处理和分析表明，等明度a*-b*平面非视觉均匀，人眼对一、二象限的色宽容度普遍高于三、四象限的色宽容度，对高彩度的橙色具有最高的宽容度，对蓝色具有最低的宽容度，所有的颜色在红-绿方向的视觉色差尺度均低于黄-蓝方向。

When coverage varying from high to low, the parameter a decreasing, and b increasing. The fitted regression equation between total vegetation coverage and runoff duration as following, C = 3.4881nt_p -11.772 (R~2=0.9477). The equation shows that the vegetation is positive correlation to duration, i.e.

高寒草甸产流、产沙的试验结果表明，不同植被盖度的嵩草草甸其产流、产沙过程可以用幂函数R=at~b分布来描述，随着盖度由大变小，方程参数a值逐渐变小，b值逐渐增大；而覆盖度在5％以下的黑土滩，其产流、产沙过程更符合指数函数R=ae~分布。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。