热塑性材料在加热、冷却过程中()。
A、既有物理变化,又有化学变化
B、既没有物理变化,又没有化学变化
C、只有物理变化,没有化学变化
D、没有物理变化,只有化学变化
参考答案:C
用所给词的适当形式填空。
1. What do you think is the most______(help)invention?
2. Edison was a great (invent). He had many______(invent) during his lifetime.
3. What______electric slippers (use)for?
4. Personal computers (invent) in 1976.
5. —What is the knife used for?
—It's used for (cut) things.
下列各项,根据《企业会计制度》,应建立备查账簿登记的有( )。
A.银行存款
B.融资租入设备
C.经营租入设备
D.已贴现应收票据