【单选题】—What's your favorite subject, Mike? —_______. It’s interesting.
【单选题】在平面直角坐标系内,设M(x 1 ,y 1 )、N(x 2 ,y 2 )为不同的两点,直线l的方程为ax+by+c=0,δ 1 =ax 1 +by 1 +c,δ 2 =ax 2 +by 2 +c.有四个命题: ①若δ 1 δ 2 >0,则点M、N一定在直线l的同侧; ②若δ 1 δ 2 <0,则点M、N一定在直线l的两侧; ③若δ 1 +δ 2 =0,则点M、N一定在直线l的两侧; ④若 δ 21...
【单选题】y=1/x在(δ,1)内(),在(0,1)内()。
【单选题】According to the passage, what can be inferred from the statistics that shows international trade climbing at 6.% against a 3.1% rise in production and consumption in the past five years?
A.
tariff barriers must be dismantled.
B.
World production and consumption lead to economic growth.
C.
International trade generates economic prosperity.
D.
Future expansions are dependent on international cooperation.
【单选题】糖类、蛋白质、脂肪在人体内共有的生理作用是 [ ]
【简答题】They don’t think they must __________________ their neighbours.A. keep up with
【单选题】例行巡视:一类变电站每2天不少于1次;二类变电站每()天不少于1次;三类变电站每周不少于1次;四类变电站()不少于1次。
【单选题】生物体内在酶的催化作用下,进行着大量而有序的生物化学反应。与物质1 物质2 物质3的物质转化过程有关的说法成立的是 [ ]
B.
如酶1由300个氨基酸缩合而成,那么在指导合成该酶的过程中,至少需要20种氨基酸、64种tRNA
C.
如以上转变过程代表氨基转换作用,那么该过程后,氨基酸的种类、数量都要增多
D.
如物质2代表呼吸作用中间产物丙酮酸,则完成过程2的场所并不都在线粒体
【单选题】Sorry,we don-t have the coat_________ you need.