对第二段中画线句子的理解，正确的一项是( )。
A．一般说来，仅依靠药物治疗，不能彻底控制帕金森氏症患者的症状。
B．对于病情严重的帕金森氏症患者来说，药物治疗已没有什么效果。
C．植入“大脑定速器”作为辅助手段，可以充分发挥帕金森氏症药物在重病者身上的作用。
D．综合运用药物治疗和大脑定速器技术，对于控制帕金森氏症重症患者的症状可收到显著效果。
参考答案：D
解析：药物治疗不能彻底控制的是重症患者的症状，故A项错；大脑定速器是药物治疗的补充手段，药物治疗不可或缺，故B项错；大脑定速器并非为充分发挥药物作用而使用，故C项错。
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| James's New Bicycle James shook his money box again. Nothing! He carefully 1 the coins that lay on the bed.＄24. 52 was all that he had. The bicycle he wanted was at least＄90! 2 on earth was he going to get the 3 of the money? He knew that his friends all had bicycles. It was 4 to hang around with people when you were the only one without wheels. He thought about what he could do. There was no 5 asking his parents, for he knew t hey had no money to 6 . There was only one way to get money, and that was to 7 it. He would have to find a job. 8 who would hire him and what could he do? He decided to ask Mr. Clay for advice, who usually had 9 on most things. "Well, you can start right here," said Mr. Clay. "My windows need cleaning and my car needs washing." That was the 10 of James' s odd-job (零工) business. For three months he worked every day after finishing his homework. He was amazed by the variety (多样化) of 11 that people found for him to do. He took dogs and babies for walks, cleared out cupboards, and mended books. He lost count of the 12 of cars he washed and windows he cleaned, but the 13 increased and he knew that he would soon have 14 for the bicycle he longed for. The day 15 came when James counted his money and found＄94. 32. He 16 no time and went down to the shop to pick up the bicycle he wanted. He rode 17 home, looking forward to showing his new bicycle to his friends. It had been hard 18 for the money, but James knew that he valued his bicycle far more 19 he had bought it with his own money. He had 20 what he thought was impossible, and that was worth even more than the bicycle. | ||||
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