查询词典 B-complex

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。

A new Ship Technology Supportability Information System architecture based on integration of 3-tier C/S, B/S was presented.

该结构克服了两层C／S、三层C／S 和三层B／S 体系结构的不足，以便更好地发挥C／S 和B／S 体系结构的特性和优势。

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。

A Some environmentalists are against the project on biological grounds.B What do the world's longest bridges have in common?D They're what will keep the bridge from going anywhere.E The second job will be to pull two sets of steel cables across the strait, each set being a bundle of 44,352 individuals steel wires.F They will tip up the scales at 166, 500 tons more than half the bridge's total mass.__2__. They're suspension bridges, massive structures built to span vast water channels or gorges. A suspension bridge needs just two towers to should the structure's mammoth weight,..

B。 分析：思路特点：注意空格后句中的词语使用特点：空格后面连续两句都涉及到了"suspension bridge/吊桥"因此判断空格处出现对"吊桥"进行讲述的句子的可能性最大，但被选项中没有该词出现，注意到空格后的句子中出现了代词They，该词的出现表明前面有复数的名词与之相呼应，而且They内容是指"桥"，因此排除A，C和E， F（没有与They呼应的内容），所以答案是B。

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。