预混人胰岛素的主要缺点包括（）。
A.餐后血糖控制欠佳
B.餐前低血糖
C.价格高
D.使用不方便
E.夜间低血糖
参考答案：A, B, E
同义句转换
1. He helped us to establish a new company.
He_ ___us______ establishing a new company.
2. The little boy is pleased to give his father assistance in cleaning the car.
The little boy is pleased to____ his father cleaning the car.
由于建设项目具有( )的特点，所以对建设项目目标的动态控制尤其重要。
A．多样性
B．统一性
C．重复性
D．一次性
