核糖(C5H10O5)是人类生命活动中不可缺少的一种有机物,它的相对分子质量为_

题型:填空题

问题:

核糖(C5H10O5)是人类生命活动中不可缺少的一种有机物,它的相对分子质量为______,核糖中,碳、氢、氧三种元素的质量比为______;其中______元素的质量分数最大.

考点:相对分子质量物质组成元素的质量比物质组成元素的质量分数
题型:填空题

根据下列各句句意和空白之后的汉语提示词,在答题卡指定区域的横线上写出对应单词的正确形式,每空只写一词。

小题1:They said that the painters were careless and their paintings were _____(荒谬的).

小题2:They are _______(反对)to my view and want to do it again.

小题3:Our friendship has steadily ________ (加强)over the years.

小题4:The boy is ____(沉迷于))to playing computer games and has lost interest in his lessons.

小题5:It is more difficult for smoking couples to become________(怀孕的).

小题6:May the friendship between the peoples of our two countries last ______(永远).

小题7:People had to gather up their few _____(财产)and escaped abroad.

小题8:Who can _______(预测)what paintings will be in the future?

小题9:We need a foreign policy that is more            (灵活的).

小题10:The Chinese people should make a greater       (贡献)to mankind.

题型:填空题

喜润,以降为顺的脏腑是()。

A.胃

B.肾

C.胆

D.脾

E.肝

题型:填空题

关于胰岛素的药理作用,错误的描述是

A.促进葡萄糖氧化和酵解
B.促进脂肪合成并抑制其分解
C.促进糖原分解
D.促进蛋白质合成并抑制其分解
E.促进钾离子进入细胞

题型:填空题

光驱的倍数越大()。

A.数据传输越快

B.纠错能力越强

C.所能读取光盘的容量越大

D.播放VCD效果越好

题型:填空题

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