查询词典 a-c

Keyboard function set through waveform type,frequency,amplitude,duty cycle,and other parameters of a signal to the microprocessor 89C51 control,MAX038 generated by the various signals,In this process,four-channel signal through D/A converters have simulated voltage and current,It transported up through the analog signal amplification,it enters the frequency MAX038 coarse-IIN,fine-tuning FADJ end,the duty cycle control-DADJ. In its COSC port received a three relays and oscillation frequency capacitance as a choice.

通过键盘设定函数波形种类、频率、幅度、占空比等参数的一个信号进入单片机89C51控制，由MAX038产生各种波形信号，在此过程中信号通过四通道D/A转换器产生模拟电压和电流，它再通过运放将模拟的信号放大，它进入MAX038的频率粗调端IIN、微调端FADJ、占空比控制端DADJ、在它的COSC端口接一个继电器和三个振荡电容作为频率选择。

Indefinite article "a/an" limits a noun to being a general thing or person.

当我们提及一个概括性的东西时，我们使用不定冠词&a/an&。这个不定冠词&a/an&限制了名词必须是概括的人或物。

Result vitamin A and 4HPR fall to Hela cell collect form have apparent inhibition, can restrain Hela cell to be opposite the action causing tumor of naked rat (the curb tumour action of P.01); vitamin A issues visible cell solid by force to shrink at 4HPR(P.01); report lens, nuclear film is screwy, nuclear chromosome gathers agglomerate stand by the wither such as nuclear film to die DNA of cell of cellular feature; by degradation, a collection of illustrative plates of typical " of shape of " a flight of stairs appears in electrophoresis of agaragar candy gel.

结果维生素A和4HPR对Hela细胞集落形成有明显抑制功能，并可抑制Hela细胞对裸鼠的致瘤功能(P.01)；维生素A的抑瘤功能强于4HPR(P.01)；电镜下可见细胞固缩，核膜扭曲，核染色体聚集成块并靠近核膜等凋亡细胞特征；细胞DNA被降解，在琼脂糖凝胶电泳中呈现典型的&阶梯状&图谱。

In the first part of this thesis, Stress relaxation method set up in the software of DMA was used to perform the aromatic and aliphalic (D2192-BAPP) PI film stretching process. To study the optical anisotropies property to the light leakage from the crossed polarizers, we put the stretched samples into one set of crossed polarizers and as expected, the stretched PI films could reduce the light leakage at view angle of ±45 deg, and exhibited a visually observed compensating property of an A-plate. No color shift wasobserved, and the birefringence was very uniform. These results prove a uniform birefringence can be obtained by a stretched process for PI films.

首先，我们以动态机械分析仪的应力缓和模式对芳香族FDA-BAPP PI及脂肪族D2192-BAPP PI薄膜进行拉伸实验，并将拉伸后的PI薄膜置於一组相互交差的偏光片中观察其光学异向性，发现拉伸后的PI薄膜试片可以降低在±45o视角的漏光的效果，展现出如同A-Plate的光学补偿特性，所显现的光学补偿效果相当的均匀而且没有色偏的情形发生，证实以拉伸方法可以造成PI薄膜很均匀的双折射效应。

Secondly, we study a class of automorphisms of A, i.e., we prove that the set {φ∈SL_n|φ= t is a subgroup of AutA(n,t,Finally, we mainly discuss some properties of the operation w in A, i.e., g~w = 0, f~w = 0 and Leibniz identity.

其次，讨论了A的一类自同构，即证明了集合{φ∈SL_n|φ=t}是自同构群AutA(n，t的一个子群；最后，得到了A的运算w的一些性质，即g~w=0、f~w=0和Leibniz等式。

The results showed that (1) all the arteries tested had tachyphylaxis to peptidergic agonists;(2) the desensitization of the arteries tested to catecholamines was uneasy except BA;(3) the desensitizations to AⅡ, AVP and PE were homologous;(4) the endothelium-EDRF -cGMP pathway had no contribution to the tachyphylaxis of PA to AⅡ and AVP;(5) membrane receptor cycling (internaliation and re-insertion) contributed only in part to homologous desensitization;(6) there was no change in the function of voltage-dependent Ca〓 channel during desensitization to AⅡ and AVP;(7) some changes in G protein occurred during homologous desensitization;(8) the most surprising finding was that the caudal arterial smooth muscle of stroke-prone spontaneously hypertensive rat showed tachyphylaxis to α〓-adrenoceptor agonist PE, while the tachyphylaxis of pulmonary artery of SHR was not changed compared with that of Wistar rat.

脱敏是消除效应的一种有效方式。因此，研究不同血管对不同激动剂脱敏的差异及阐明脱敏的机制，有助于阐明血管活动个性化的机制。研究表明：血管对肽类激动剂的脱敏方式为快速脱敏，而对儿茶酚胺类激动剂不易脱敏；血管对肽类激动剂和儿茶酚胺类激动剂表现为同源脱敏；内皮-NO-cGMP通路不参与肺动脉对AⅡ和AVP的快速脱敏；用PAO抑制膜受体的内在化只能短暂抑制脱敏的发展，提示用膜受体数目的下调说不能完全解释同源脱敏；血管对AⅡ和AVP脱敏后VSMC细胞膜电压依赖性钙通道功能无改变；CA对AVP脱敏后GTPγS的量-效曲线下移，说明有G蛋白的变化，但这种变化并非G蛋白的亲和性改变；SHRsp之CA平滑肌对AⅡ和AVP的快速脱敏并未减弱，但对PE却表现为快速脱敏，这是我们首次发现的一个非常有趣的现象。

METHODS: Non-derivatised cuvette immobilised Lipid A was used to track the bonding between the Lipid A and aqueous extracts and alcoholic extracts from seventy-eight TCM, and then neutralized endotoxin in vitro by selecting hypso-bonding TCM that removed the tannins.

将革兰阴性细菌的脂质A包被于生物传感器的非衍生板建立靶点，跟踪测定赤芍、大黄、黄芩等78种中药的水提物和醇提物与Lipid A的结合活性，再将筛选出的中药去鞣质后与定量的内毒素（LPS，20、50ng·ml^-1）37℃孵育30min后，测定孵育后的样品与Lipid A的结合情况，以评价样品内的活性物质含量。

The global total consumption of mythyl ethyl ketone in 2004 was about 900 kt/a,with a production capacity of 1 300 kt/a,and it can be anticipated that by 2007 the market of methyl ethyl ketone will be overstocked.

2004年全球甲乙酮的总消费量约为90万t/a，生产能力约为130万t/a，预计2007年前甲乙酮市场仍将出现产能过剩的状况。

Instead of saying "right away", a Southerner might substitute any of the following:"faster than you can skin a cat";"quicker than you can say 'Jack Robinson'"(don't ask me who Jack is);"right now in a minute"; or "lickety-split".

南方人可以使用以下各种方式来替代&right away&的说法：&faster than you can skin a cat&、&quicker than you can say 'Jack Robinson'(比你念&Jack Robinson&还要快)&(我也不知道Jack是谁)、&right now in a minute&，或&lickety-split&。

The oversampling sigma delta A/D converter is a high-resolution and low-cost A/D converter.

过采样sigma delta A/D变换器是一种高精度、低成本的A/D变换器。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。