2. 记忆加固机制:慢波睡眠期间海马体与新皮层进行信息转存(Nature Neuroscience 2006);3. REM睡眠占比:学习任务重时应保障25%的REM睡眠(每周期90分钟)。实验数据显示:连续两周睡眠不足6小时的大学生,其情景记忆测试成绩下降32%(Sleep期刊2018)。研究建议考前每天额外增加0.5-1小时睡眠可提升认知灵活度17.3%。
该词省略不会影响句子的意思。“How many hours”提问的是一段时间，通常表示动作或状态持续的时间，因此后面的介词“for”可以省略，不会影响句子的意思。“how many hours”本身已经包含了持续的时间，所以不需要再用“for”来表示持续的时间。
(B)23. -How many hours do we need to every day?-Eight hours. So it's good for our study. A. swim B. sleep C. speak D. clean 相关知识点: 试题来源: 解析 答案见上【答案】B【核心短语/词汇】how many: 多少be good for...: 对……有好处,对……有益【翻译】---我们每天需要睡多少...
用How long提问更合适，表示“多长时间”。时间有可能不是整数，如果回答是几小时几分钟（不一定能整除），提问直接是How many hours有点不对应
The diagrams show how Liverton docks changed since 1980. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words. Task 1 地图 - - 范文 答题 Some people think that secondary school students should study international ne...
句意:——你每天在学校待多久?——9个小时。 考查特殊疑问句。How long多长时间;How many多少;What time什么时候;How much多少钱。根据“For 9 hours.”可知,问题询问的是时间长度,因此使用“How long”提问合适,表示“多长时间”。故选A。反馈 收藏 ...
15. How long does the woman usually sleep every day? A. For about five hours. B. For about seven hours. C. For about eight hours. 16. What does the man suggest the woman do? A. Ask the professor for help. B....
1. Teenagers should sleep for 8 to 9 hours a day.(对画线部分提问)How many hours should teenagers sleep a day?2. I really don't know what I can do to help her out.(改为简单句)I really don't know what to do to help her out.3. Dave's father went to bed after Dave came ...
—Eight. I think eight hours of sleep ___ enough for most kids. A.isB.areC.wasD.were试题答案 在线课程 【答案】A 【解析】 句意:——你每晚睡几个小时?——八个。我想八小时的睡眠对大多数孩子来说已经足够了 考查系动词。根据主句是一般现在时,从句介绍的是自己的看法,所以用一般现在时;表示时间...
And now you are ready to drink your coffee. You should do this over a period of three hours, making the coffee last as long ___45___ possible, which is just the way the British like it. So, now you know how the B...