题干

如图所示,物理实验中经常需要对物体加热,下列描述中与实际吻合的是(   )

A:甲图中,加热时水温升高,小金鱼将会死亡

B:乙图中,对沸腾的水继续加热,温度计的示数将不断升高

C:丙图中,对金属丝加热,灯泡将变暗

D:丁图中,用完全相同的装置给初温、质量均相同的水和花生油加热,水的温度升高得快一些

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答案(点此获取答案解析)

C

同类题5

阅读理解

    On a stormy day last August, Tim heard some shouting. Looking out to the sea carefully, he saw a couple of kids in a rowboat were being pulled out to sea.

    Two 12-year-old boys, Christian and Jack, rowed out a boat to search for a football. Once they'd rowed beyond the calm waters, a beach umbrella tied to the boat caught the wind and pulled the boat into open water. The pair panicked and tried to row back to shore. But they were no match for it and the boat was out of control.

    Tim knew it would soon be swallowed by the waves.

    "Everything went quiet in my head," Tim recalls(回忆). "I was trying to figure out how to swim to the boys in a straight line."

    Tim took off his clothes and jumped into the water. Every 500 yards or so, he raised his head to judge his progress. "At one point, I considered turning back," he says. "I wondered if I was putting my life at risk." After 30 minutes of struggling, he was close enough to yell to the boys, "Take down the umbrella!"

    Christian made much effort to take down the umbrella. Then Tim was able to catch up and climb aboard the boat. He took over rowing, but the waves were almost too strong for him.

    "Let's aim for the pier(码头)," Jack said. Tim turned the boat toward it. Soon afterward, waves crashed over the boat, and it began to sink. "Can you guys swim?" he cried. "A little bit," the boys said.

    Once they were in the water, Tim decided it would be safer and faster for him to pull the boys toward the pier. Christian and Jack were wearing life jackets and floated on their backs. Tim swan toward land as water washed over the boys' faces.

    “Are we almost there?" they asked again and again. "Yes," Tim told them each time.

    After 30minutes, they reached the pier.

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