一个打字员4分钟输入200个汉字.照这样计算,输入3000个汉字需要多少分钟?
3000÷(200÷4),
=3000÷50,
=60(分钟);
答:输入3000个汉字需要60分钟.
Smoking does great harm to our health. ( ) is smoking allowed in public places.
A. In no time B. At a timeC. At all times D. At no time
记忆时着重记忆中间的知识点,是利用了艾宾浩斯的记忆原理。