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(共22张PPT)
Unit 3 Lesson 16
1 Master new words and phrases of lesson 16.
2 Know safety tips to prevent accident.
3 To give warning with imparetives（祈使句）.
Learnning Aims
Words and expressions
pre/vent
cer/tain
them/selves
baking
so/da
salt
scissors
v. 阻止；预防
adj. 某些；某个
pron. 他(她、它) 们自己
n. 烘焙
n. 苏打
v. 食...