如图所示为生活中常用的热水瓶，注入一定量的热水后，立即盖上软木塞，软木塞常会跳起来.在软木塞跳起来的过程中，热水瓶内温度____(选填“升高”、“不变”或“降低”).汽油机中的____冲程与这一现象的能量转化相同.

Look out of the window.(改为否定句)

______________________________

在横线里填上 “> ”“<”或“ =.”

He fell asleep immediately last night; he must ________ (be) very tired.

Can I have ______(a) orange?

How many _____(hour) are there in a day?

“Here you are.” “_____(thank).”

Night ________ (fall), we hurried home.

is ，the ，what ，weather ，today ，like

____________________________________________

苏轼《念奴娇(大江东去)》中“___ ”一句，写的是周瑜的儒将装束，“ ___”一句，表明了周瑜的赫赫战功。