选出下列各项中加点的字解释有误的一项:( ) A.秦王购之金千斤(代词,指樊将军的首级) B.为之奈何(代词,他)
正常燕麦胚芽鞘向光弯曲生长,而去掉尖端的胚芽鞘不生长,也不弯向光源,以上实验可以证明( ) A.尖端产生了生长素 B.生长素能促进植物生
物理小组的同学用如图所示的实验器材测定重力加速度,实验器材有:底座.带有标尺的竖直杆.光电门1和2组成的光电计时器(其中光电门1更靠近小
Of the two coats, she’d like to choose the ________ one to save money for a book. A. cheapest B. cheaper C. more expensive D. most expensive
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三角形一边长为10,另两边长是方程x2-14x+48=0的两实根,则这是一个________三角形,面积为________.
Can I _________ the TV, Dad? I want to watch the sports news. A.turn off B.turn on C.turn down D.turn up
Mr. Smith is considering ______ a computer, which is considered ______ a great help in our work and study. A. to buy; to be B. buying; to be C. to buy; being D. buying; being