题目：
用括号内所给单词的适当形式填空。
1. There are many________(invent) on show in the science museum.
2. Grandfather wants some coffee. Would you mind_________(heat) the coffee?
3. The special scoop is used for__________(scoop) really cold ice cream.
4. My favorite shoes arc those with__________(adjust) heels.
5. This machine ,can _________(operate) easily, so you don't need much skill to do the job.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B解析：低钾血症典型的心电图表现早期出现T波降低、变平或倒置，随后出现ST段降低，Q-T间期延长和U波出现。故答案应选B。
