发明创造的源泉是()。
A.创新思维
B.创造能力
C.科学技术
D.科技人才
参考答案:C
. ____ by the thought that she was suffering a heart attack, she screamed for help.
A.Terrifying
B.Terrified
C.Being terrified
D.Having terrified
图示说明细胞能正常完成各项生命活动的前提条件是()
A.膜的选择透过性
B.线粒体供能
C.核内有遗传物质
D.细胞保持完整性