【简答题】某同学做了“探究影响玉米种子萌发的环境条件”的实验:在A、B、C三个干净的培养皿中分别铺上两层滤纸,再将相同数量的玉米种子放在上面,在不同条件下进行培养(如图).数日后记录发芽情况如右表: (1)该同学设计的实验可以说明,______是影响种子萌发的环境条件;若只设置B、C装置进行实验,则探究的问题是______? (2)若想探究“光照对玉米种子萌发的影响”,该如何设计实验? ______ (3)...
【单选题】( )2.There is junk food here,and it is terrible.
【简答题】论述顾客需求、顾客满意、持续改进之间的逻辑关系
【单选题】There are many ways to study for a test.
A.
You can improve your grades by being known by your teacher regularly.
B.
You can study an hour a night the week of the test.
C.
You can get up early the morning of the test and study.
D.
You can review a few hours the night before the test.
【判断题】There is 10 cm scratches on the bumper.
【简答题】研究性学习小组的同学做了“观察被子植物花粉管”的实验后,所写的实验报告如下: 实验材料及条件:葱兰的成熟花粉、5%蔗糖液、吸管、载玻片、低倍显微镜、脱脂棉、室温20℃。 方法步骤: ①5%蔗糖液滴2滴于载玻片上,用少许脱脂棉蘸取适量花粉弹落于蔗糖液面上,保持悬浮; ②轻轻将载玻片放置在显微镜载物台上,防止花粉粒下沉影响萌发。大约经过2小时,仅观察到个别花粉粒伸出很短的花粉管; 实验结论:在蔗糖液面...
【单选题】There are lots of _____ there, but hardly any _____.