【单选题】听力原文:W: I hear you're joining that expedition across Alaska. Did you get much funding for it? M: You must be joking! I have to pay my own airfare and contribute toward the cost of supplies. Q: What do...
A.
It'll cost him a lot of money.
B.
He isn't serious about going.
C.
Other people paid for his airfare.
D.
It isn't fair for him to go alone.
【单选题】I am sorry to hear you're ill. I hope you are now. [ ]
【简答题】萘乙酸(NAA)是一种生长素类似物,作用与植物生长素相似.某同学决定探究“生长素类似物萘乙酸(NAA)对植物生长有何影响”.他选用了相同的番茄种子作为实验材料,配制一系列不同浓度的NAA溶液作为培养液.在培养皿底部铺3层纱布,分别用清水和不同浓度的NAA培养液润湿,然后在每个培养皿中放入相同粒数的选好的种子.在培养皿盖上标号,盖上培养皿,观察胚轴的生长情况.3天后,数据如下表所示,请依表中数据回答...
【简答题】土壤水分有哪些?其中哪些水分对植物的生长发育有重要作用?
【单选题】在本系统中,伺服放大器与伺服电机的连接需要几根连接线?
【单选题】在本系统中,伺服放大器与伺服电机连接需要几根连接线?
【单选题】在沙漠生长的植物,有些会生长出针状叶,它的主要作用是
【单选题】为研究两种植物激素对某禾谷类植物生长的影响,将其幼苗分别置于不同条件下培养,一段时间后,观察并测定株高变化,结果如下表。下列分析错误的是 A .0.5g·L-1的生长素对该禾谷类植物生长有抑制作用 B .0.1mg·L-1的油菜素对该禾谷类植物生长有促进作用 C .清水组的禾谷类植物受自身合成的生长素的调节 D .0.1mg·L-1油菜素可增强生长素对该禾谷类植物生长的抑制作用
【单选题】I'm sorry _______ that you're ill. [ ]