一个学校的两个老师的回复，请教啊？急问

就是我之前申请了一个学校，阴错阳差的联系了两个老师，事情是这样的：
申请之前陶瓷的时候，我联系了A老师，A老是跟我要了成绩单，但是A老师之后一个月都没再理我了，网申完之后，我就以为A老师觉得我成绩低，没戏了，就又联系了另外一个---B老师，B老师回邮件跟我说，他回头看看我的申请，之后也没信了。
. Waral dи,过了一阵，大约半个月左右，A老师回邮件，跟我说“他会帮我”之类的，比较积极，我也给我他回邮件，表示感谢啥的
又过了半个月，也就是今天（距离我之前联系他都快一个月了），突然收到B老师邮件，说他明年在上海。让我去跟他在上海实习，再考虑RA的事

B老师邮件如下：
Dear XXXX,

Thank you very much for applying XXXXX.  After carefully inspecting your application material, I would like to discuss with you about a possible opportunity for going forward. During spring 2013, I will have my sabbatical in XXXX(一个研究所，关于老师隐私，我就不详写了）, Shanghai, China (located at Pudong District, Shanghai). This institute provides paid internship (approx. 1500RMB per month stipend plus lodging) for graduate students from Chinese universities. I am writing to see whether you are interested in this internship, which could give us the opportunity to know each other, and possible work on research projects together. I would like to note that I seldom make RA off directly. So I plan to recruit three~four interns and will make RA offers based on the performance during the internship. On the other hand, this internship does not imply you need to make any commitment to me and you have complete freedom to accept RA offers from other USA universities. The preferred starting date should be between January 1st, 2013 and Feb 20th, 2013. The duration is preferably 4~6 months. If you are interested and serious about this internship, please let me know the following information: (i) the preferred exact starting date, (ii) the preferred end date, (ii) other special needs. Thank you very much and looking forward to hearing from you.


这个是A老师的邮件
Hi XXX,
Sorry to get back to you late. I just saw your application. I am a kind of interested in you. We have a strong group working on storage systems. You can find more information about our group at XXXX（一个他们实验室的链接）. Since this is still very early in our evaluation process, I will try to push your case through. Please feel free to contact me if you have any questions.






现在我就不知道该怎么办了，因为A老师回复的略微早点，因此我已经给他回了邮件，表示了对他研究很感兴趣，想加入他的实验室。现在B老师又来了邮件，我一下就犹豫了

大牛们帮我看看，A老师这个邮件算是要我了吗？这个承诺保险吗？按说一个学校联系两个老师，这是很不礼貌的，但是当时确实两个老师回的邮件有个时间差，导致了现在这个结果，我现在就是担心拒绝了B老师的实习，A老师那边最后又没有给奖学金火者有别的问题，就鸡飞蛋打了。但是我又怕答应了B老师的实习，最后万一两个老师发现我同时联系了他们，会不会很不好啊？让老师觉得我这人人品有问题，最后谁也不录取我了。而且我明年6月份硕士毕业，这半年还要写毕业论文，所以去实习的话时间也很紧，而且实习也没说一定会给offer。所以现在很是犹豫啊，希望得到大家的指点啊。拜托大家了
我本来是想跟B老师说我过完年去实习，这样没准之前A老师那边就有消息了，到时候就好选择了，不知道在这样合不合适？而且也怕到时候万一A老师那边还没有消息，B老师这边也不能拖了，还是很麻烦。

注：A老师是个台湾人，50-60岁了吧，主任，教授，估计跟了他，他也不会亲自指导，也是交给手下的人带，不过实验室项目很多，要求应该也比较严
     B老师是大陆的，40左右，副教授，估计很push，休个假期还要回国接着干
     这两个老师的方向倒是跟我都比较对口，而且这个学校我也非常想去

真心求指导啊，拜托大家了

要是我

就先刨除感情因素两个中选一个继续交往

然后跟另一个说实话

感觉跟着B，日子会很不好过。（个人观点，酌情考量）