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(10分)、有机物A由碳、氢、氧三种元素组成，可由葡萄糖发酵得到，也可从酸牛奶中提取，纯净的A为无色粘稠液体，易溶于水。为研究A的组成与结构，进行了如下实验： （1）称取A 9.0g，升温使其汽化，测其密度是相同条件下H 2 的45倍。 试通过计算填空： （1）有机物A的相对分子质量为： 。 （2）将此9.0gA在足量纯O 2 充分燃烧，并使其产物依次通过碱石灰、无水硫酸铜粉末、足量石灰水，发现碱石灰增重14.2g，硫酸铜粉末没有变蓝，石灰水中有10.0g白色沉淀生成；向增重的碱石灰中加入足量盐酸后，产生4.48L无色无味气体（标准状况）。 （2）9.0g有机物A完全燃烧时，经计算：生成CO 2 共为 mol， 生成的H 2 O g。 有机物A的分子式 。 （3）另取A 9.0g，跟足量的NaHCO 3 粉末反应，生成2.24LCO 2 （标准状况），若与足量金属钠反应则生成2.24LH 2 （标准状况）。 （4）A的结构 。 （4）有机物A可跟乙酸发生酯化反应，其质量比为3:2；有机物A也可跟乙醇发生酯化反应，其物质的量比为1:1；且酯化反应分别发生在链中和链端。 （5）有机物A可否发生缩聚反应？若能，请直接写出反应的化学方程式；若不能，请指出原因
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【单选题】Because the lawyer's wife was seriously ill, the doctor ______.
A.
couldn't do much and didn't save her life
B.
tried his best and saved her at last
C.
had to do everything he could for her
D.
had to spend a lot of time to cure her
【单选题】听力原文：W: It was really a nice party. M: I' m glad that you came. W: It's a pity Paul didn't come. M: He has been iii for a couple of days. Why didn't Paul come to the party?
A.
Because he was busy.
B.
Because he was ill.
C.
Because he was on a trip.
【单选题】The reason why he didn`t come to school was _______ he was ill.
A.
Because
B.
why
C.
how
D.
that
【单选题】Why didn;t Uncle Andew go to the "Other World" by himself?
A.
Because he was afraid of the potential dangers.
B.
Because he hated that place.
C.
Because he was ill.
【单选题】He didn ’ t go to school yesterday he was ill.
A.
so that
B.
because
C.
though
D.
just as
【单选题】The reason why he didn ’ t come to school was _____he was ill.
A.
because
B.
why
C.
how
D.
that
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