按照资本保全原则，企业筹到资本金后，在企业生产经营期间，投资者除依法转让外， 一般不得抽回投资。( )
参考答案：对
请根据句意及提示，写出所缺单词。
1. He brushes his ________ (牙齿) and has a shower every morning.
2. —Are you b________ today?
—No. I have nothing to do.
3. The Maths exercises are ________ ( not hard; not difficult) .
4. The car is very________ (have a high price) .
5. —Which month comes after September?
— ________.
不需做胸部增强扫描的是：（）
A．明确分辨纵隔结构时
B．确定大气管有无狭窄时
C.区分纵隔肿物与大血管时
D．肿块合并肺不张时
E.分析复杂的大血管畸形时
