23°30′=____°.
3.76°=____°____′____″.
25.72°=____°____′____″.
15°48′36″=____°;
3600″=____′=____°.
如图是某有机物分子的简易球棍模型,该有机物中含C、H、O、N四种元素.下列关于该有机物的说法中错误的是( )
-Is this your key, Jenny?
-No. ____ is in my schoolbag.
I am an American boy. 1name is Paul. I am 12. I2two friends, Sally and Mona. They're3. We play sports4 We play soccer, basketball, volleyball and5 Sally6a sports collection(收藏).7has seven soccer balls,8basketball, four volleyballs, and six tennis rackets. We often(经常)9volleyball on TV. What sports10you often play?
新中国的历史,是一部探索中曲折前行的历史,中国号巨轮劈波斩浪,经历失误和挫折后,终于找到了一条正确的航线。中国号巨轮驶入正确航线开始于( )