下列现象中能说明分子间存在斥力的是[ ]
A.气体总是很容易充满容器
B.水的体积很难被压缩
C.清凉油的气味很容易被闻到
D.两个铁块用力挤压不能粘合在一起
答案:B
句型转换。
1. He has to make dinner at home. (改为否定句)
He ____ ____ to make dinner at home.
2. He has to do his homework after school. (对划线部分提问)
____ does he have to ____ after school?
3. Come to the party at 5 o'clock, please. (改为否定句)
____ ____ to the party at 5 o'clock, please,
4. What else do you have to do? (改为同义句)
What ____ ____ do you have to do?
5. They can play tennis in the gym. (改为一般疑问句)
____ they ____ tennis in the gym?
反映材料由固态变为液态的特征温度为( )。
A.熔点
B.冰点
C.闪点
D.燃点