16STEMSTEM227 STEM 9300161400...

STEM STEM++...

1400017 1300...

930 3...

2 ++ 2 1+2020 35+415++ 1+41+ 4 50 1015 30 1512 36 611 95% 400 + +...

+ 611 + ++...

17410 249 5.4 3001200...

11 .2% 6 44 2025 3 1 .03.0...