填入下列文段空白处的词语，最恰当的一组是（    ）

   乐音在基本确定了音高的范围后，有规律的声音节奏或声音组合   ①  成了让人产生美感的第一要素。   ②   声音仅仅含有节奏和有序性，  ③   不能成为“好声音”，钟表的“滴答”声、音乐节拍器的摇摆是最精准的节奏声音，  ④   它却无法给人以美感，  ⑤   会带来厌烦。  ⑥  ，为了使美好的声音成为艺术，还必须具备下一个条件：声音变化的丰富性。

	①	②	③	④	⑤	⑥
A	就	虽然	但是	可是	而且	所以
B	/	如果	就	然而	甚至	/
C	就	如果	还	然而	甚至	所以
D	就	因为	所以	可是	而且	所以

    I had worked that day, as a nurse. Now I faced the dirty supper dishes. I wanted to 1why Jimmy hadn't phoned as usual to say “Good night”to Bob and Tom. “Maybe Daddy's 2 working on an accident,” I said to Bob. “Go to3 now. You'll see him in the morning.”Soon there was a knock at the door. “There4 be something wrong with your phone,” my neighbor told me. “The City Police Station wants you to 5.”
    I went into the living room and dialed. Then I 6 the words every police wife fears (害怕): “Your husband has been hurt.” When I reached the hospital, my heart sank (下沉). The entrance was jammed with TV-news trucks. In the 7  I saw Jimmy’s best friend, Smith. “Just tell me -is he alive ?” I asked.
    Smith 8. and didn't answer. Then I found my younger sister, Mandy. “He’9s ”she told me, and we began to cry together.
Later, Smith told me 10 had happened.
    In the morning, when my little Bob asked, “Where's Daddy?” I 11  him into my arms and tried to explain. “A bad man 12 Daddy last night.” I said. “Daddy can't come home any more. He's in heaven(天堂) now.”
My son looked at me, his blue eyes 13 the picture of trust(相信). “Do they have14 in heaven ?”he asked. “Can I call him ?”
“No, Bob, Daddy still loves you, but Daddy can't15”.

在同一直角坐标系中，正比例函数y=2x的图象与反比例函数y= $\frac{4-2k}{x}$ 的图象没有交点，则实数k的取值范围在数轴上表示为（   ）

欧洲中世纪后期在教会神学的笼罩下产生了大学的世俗教育。出现这一状况的根本原因是

山西省是我国重要的能源基地。下两图分别是“山西省及煤炭分布简图”和该省某地遵循“循环经济”理念设计的一个工业“生态链”。读图，回答下列问题。