【单选题】某同学做过如下的实验:①②③④⑤⑥为六个空白琼脂块,经过一段时间后,对实验结果的预测和实验结论等相关内容叙述正确的是()
A.
①含生长素比②多,③含生长素比④多,⑤含生长素比⑥多
B.
若将①和⑤放置于去除尖端的胚芽鞘一侧,则二者生长趋势相同
C.
由此实验可知,生长素有极性运输现象,并且该现象和单侧光照有关
D.
若将①和②均放置于去除尖端的胚芽鞘一侧,放置①的胚芽鞘弯曲角度更大
【判断题】Zhao Qing va a perderse en Caracas si sus amigos no le reciben.
【判断题】对于出口商而言,采取远期付款交单比采取承兑交单所承担的风险更大。()
【单选题】In ordinary conversations, participants are expected, first of all, to , otherwise, communication would break down.
【单选题】关于实验过程中的操作安全,不正确的是()。
B.
浓酸.浓碱等废液,倒入水槽时,必须先将水门打开
C.
高温物体(如灼热的坩埚,瓷舟等)就近放下,以免烫伤
【单选题】If there no cultural difference, international communication would be much easier.
【单选题】In ordinary conversations, participants are expected, first of all, to _____, otherwise, communication would be break down.
【单选题】电力场效应管MOSFET在使用的存放时,要防止( )。
【单选题】A(n) ________ network of communication would most likely be found in direct-line authority relations with no deviations.