问题
选择题
下列物态变化事例中属于放热的是[ ]
A、将水蒸气通入冷凝管中收集蒸馏水
B、冰箱中冷凝剂制冷
C、在衣柜内放“卫生球”防蛀
D、冬天将冻肉放在水中解冻
答案
答案：A
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下列物态变化事例中属于放热的是[ ]
A、将水蒸气通入冷凝管中收集蒸馏水
B、冰箱中冷凝剂制冷
C、在衣柜内放“卫生球”防蛀
D、冬天将冻肉放在水中解冻
答案：A
| 选择适当的词组填空。根据所提供的语景，从方框中选择正确的短语填空完成句子： | |
2. The pilot, whether _____or design, made the plane do a sharp turn. 3. The library was built ______ the scientist. 4. As they don't have enough gas, they have decided to ______gas supplies to other cities. 5. The good news _________ whoever heard it. 6. -I wonder if I could use your dictionary. -Sure, _____. 7. He _________ making everybody around him happy. 8. On Halloween, children would _____ and go door to door asking for treats or playing tricks. |