1. INTRODUCTION

2. OBSERVATIONS
2.1. Ka-band receiving system of TMRT
2.2. The Ka-band survey

3. OBSERVATIONAL RESULTS
3.1. Data reduction
3.2. Line identification
3.3. Overview of the spectral lines

4. RRLS

5. MOLECULAR LINES
5.1. Methanol emission
5.2. N-bearing species
5.3. Other species

6. SUMMARY