粘性土的界限含水量是土体的固有指标,与环境变化无关。
参考答案:对
由4个相同电池串联而成的电池组向阻值为6Ω的电阻供电,如果电池消耗的总功率为32W,输出功率为24W,则每节电池的内电阻为______Ω;供电时电池组两极之间的电压为______V.
按要求改写句子。
1. How's the weather in Singapore? (改为同义句)
the weather in Singapore?
2. —____ ? (看答语写问句)
—It's great.
3. There is a lot of rain in the south of China this year. (改为同义句)
often____ in the south of China this year.
4. Tom wears a shirt because it's hot here. (对划线部分提问)
Tom wear a shirt?
5. He plays computer games every morning. (改为现在进行时)
He _____ computer games now.