【单选题】B2-U8_3_2.mp3: Why did Charlie feel stressed( )
A.
Because he wanted to change his major
B.
Because his parents gave him much stress.
C.
Because he had to make a crucial decision.
D.
Because he had too many dreamin his min jobs in his mind
【单选题】“满江红”用作词牌名,他在自然界中是一种什么东西?
【单选题】浮游生物是指悬浮在水层中常随水流移动的海洋生物。德国浮游生物学家亨森首先用“Plankton”一词专指浮游生物,该词来自希腊文,意为漂泊流浪。请问浮游生物本身究竟有没有运动能力呢()。
【单选题】How about _____ this night? [ ]
【单选题】浮游生物,是用来称呼藻类、原生动物和其他微生物的.它们大量生长在海洋的表层.下面哪一叙述说明了浮游生物在自然界中起着最重要的作用( )
【单选题】—What are we going to do on Sunday? —How about _____? [ ]
【简答题】下图是海洋生态系统中最普通的能量金字塔。从图中可知,大鱼吃小鱼,小鱼吃虾,虾吃浮游动物,浮游动物吃浮游植物。请分析回答:(9分) (1)海洋生态系统中的各种生物通过 的关系形成食物链,这条食物链是: 。 (2)该生态系统中的能量最终来源于 ,将能量转移到有机物中的生物是图中的 ,该类生物在生态系统中的地位是 者,它们在该生态系统中所蕴含的能量最多。能量在沿食物链传递的过程中具有逐级 的特点,因此该...
【单选题】– There's a new cafeteria at the corner. How about going there for supper? – ( ).
A.
Fine. But it's my treat this time
C.
Let's look at the menu first
D.
I have no idea about what to order