由于仪器设备缺陷，操作者不按操作规程进行操作，以及环境等的影响均可引起系统误差。( )
参考答案：错
计算3.4×9.9，可以用3.4×（9.9+0.1）进行简便计算．______．（判断对错）
用所给词的适当形式填空。
1.Do you have a _____(health) lifestyle?
2.John drinks lots of _____(coffee)every day.
3.Bill is kind of _____(healthy)．He often feels ill.
4.Learning skills help you _____(get) high grades.
5._____(eat) habits are important for our health.
6.My sister eats _____(little)meat than before to lose weight.
