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The invention relates to a synthesis method of the chemical luminous material acridine ester DMAE question mark NHS.

本发明涉及一种化学发光物质吖啶酯DMAENHS的合成方法。

This can be toggled on/off by clicking the question mark in the army list view (Opening this scroll is also the easiest way of awarding titles).

通过点击军队清单界面上的问号可以选择开关"头衔管理"功能。（打开这个清单是授衔的最简单的方式了）。

But whether the company can broadcast the Olympics on the network is still a big question mark.

但该公司是否能够在网络上直播奥运会仍是个大大的问号。

There is still a large question mark over the possible involvement of Clemens Fritz.

这仍然是在Clemens弗里茨的可能的参赛的一个大问号。

The exclamation mark is given for inventiveness, and the question mark - well, it is just an obligatory sign.

叹号是因为新意，而问号是必须要打的。

We can use reported speech to talk about what someone else said , we should change the tenses , the time adverbils , the word order and change the question mark to a full mark if nessary.We do not need to change the tense if we are reporting a fact or the information is still true.

间接引语的概念：我们用间接引语来转述别人的话，在转述的过程中，需要进行时态，时间状语，语序，人称以及标点符号等方面的改变，但如果所转述的内容到目前为止仍是一个事实，或是一个客观真理是，则不必改变时态。

But a re-analysis of their skeletons, published in the Public Library of Science by Mark Witton (who is also the artist in question) and Darren Naish, both of Portsmouth University, in England, suggests they were more like giant storks.

不久之前羽蛇龙和它的亲戚们还被认为是在海中捕鱼的猛兽，而经过最近对其骨架的再次分析，英国朴姿茅斯大学的Mark Witton和Darren Naish在《公共科学图书馆》上发表文章认为它们更貌似一群巨鹳。

Vicki: No problem with that, Mark, but I question your objective of using a new operating system.

这个没有问题，Mark。但我对你在目标一栏中所说的使用一套新的操作系统不太理解。

Vicki: No problem with that, Mark, but I question your objective of using a new operating system.

问题，Mark。但我对你在一栏中所说的使用一套新的操作系统不太理解。

A preparation method of the visible-light photocatalyst Bi2WO6 nano-powder is characterized by comprising the steps as follows:(1) the selection of raw materials;(2) bismuth nitrate Bi(NO33 question mark 5H2O is added into a citric acid solution to obtain the citric acid solution containing white sediment;(3) EDTA is added into ammonia water which is then added dropwise with the citric acid solution containing the Bi(NO3)3 question mark 5H2O so to obtain a solution of bismuth;(4) the solution of bismuth is added with (NH4)6W7O24 question mark 6H2O solution to form a precursor solution which is then stirred, dried, coked, cooled and ground to obtain decarburized powder;(5) the decarburized powder is roasted for 2h to 4h under 450 DEG C to 550 DEG C to obtain the visible-light photocatalyst Bi2WO6 nano-powder.

可见光催化剂Bi 2 WO 6 纳米粉体的制备方法，其特征在于它包括如下步骤：1原料的选取；2将Bi(NO 3 ) 3 5H 2 O加到柠檬酸溶液中，得到含有白色沉淀的柠檬酸溶液；3将乙二胺四乙酸加到氨水中，并缓慢滴加入含有Bi(NO 3 ) 3 5H 2 O的柠檬酸溶液中，得铋的溶液；4将(NH 4 ) 6 W 7 O 24 6H 2 O溶液加入上述铋的溶液中，组成前驱液；搅拌，干燥，焦化，冷却后，研磨，得去碳的粉体；5将去碳的粉体在450～550℃下焙烧2～4h后，得到可见光催化剂Bi 2 WO 6 纳米粉体。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。