—So you saw the accident with your own eyes? —Yes. I for the bus across the street. A.was waiting B.have
恩格斯说:“文艺复兴这个名字没有将这个时代充分表达出来”。其含义是( ) A、它没有将古希腊、罗马文化完全复兴 B、它把古代文
生物体由小长大,是由于( )A.细胞体积增大B.细胞数目增多C.细胞体积增大和细胞数目增多D.细胞体积增大或细胞数目增多
-I heard they went skiing in the mountains last winter. -It _______ true because there was little snow there. A. may not be B. won’t be C. couldn’t be D. mustn’t be
在植物受伤时,一种由18个氨基酸组成的多肽——系统素会被释放出来,与受体结合,活化蛋白酶抑制基因,抑制害虫和病原微生物的蛋白酶活性,限制
俄国十月革命取得胜利的主观原因是( ) A.俄国进入帝国主义阶段 B.俄国资本主义发展落后于西欧 C.国内各种矛盾尖锐
Some of the roads were flooded, _______ makes our journey more difficult. A. that D. it C. which D . who