自然界中的生态因素包括 因素和 因素。 非生物因素包括 、 、 、土壤等。
将下列英语句子翻译成汉语。 1．As you can see, in some ways we look the same, and in some ways we look different． 2．He was also the first Chinese pianist in the 70-year history of the
Different from popular thoughts, sometimes flu（流感） is not caused by bad weather. It is caused by viruses in the body. 51 , A/H1N1 flu has been spreading in the most parts in the world. S
如图所示，导热性能良好的气缸内用活塞封闭一定质量的空气，气缸固定不动。一条细线左端连接在活塞上，另一端跨过定滑轮后连接在一个小桶上，
姜老师给出一个函数表达式，甲、乙、丙三位同学分别正确指出了这个函数的一个性质。甲：函数图像经过第一象限；乙：函数图像经过第三象限；丙
2009年5月4日,纪念五四运动______周年大会在人民大会堂举行。 A．90 B.80 C.100 D.60
My brother ______singing ______ dancing while I _____ dance _____sing. A. prefers , to , would rather , thanB. would rather , than , prefer , to C. prefers , than , would rather ,toD. would rather , t
符合题意。