题目内容：
下面是一节高中英语课堂教学片段实录。T: Arm yourself with sunscreen, sunglasses and a hatin a period of hot weather.
S1: How can you arm yourself? You already have two arms
—how do you put on more?
T:Canwefigureoutthemeaningof“arm”fromthetext?Lookforanotherplacewheretheword“sunscreen”appears. S2:Inthissentence:“Healthexpertswarnedpeople,when outside,toapplysunscreenwithasunprotectionfactor…”
S3: So I think “arm yourself” is kind of “apply”. S1: Oh, that makes sense. Is he right?
T:Icouldansweryou,butI’dlikeyoutofindoutthe meaning of “arm” in the dictionary.
…
T: Got it? Can you explain it in English?
S4: Yes, it’s a verb, different from the noun“arm”, meaning to provide yourself or others with weapons or to provide what you need for a task.
T: Nicely done!
根据上面提供的信息，回答下列问题：
（1）该教学片段的语言教学目标和策略目标分别是什么？（8 分）
（2）该教师采取了哪三种方法达成上述目标（12分）
（3）该教师教学的一个优点和一个缺点分别是什么？（10分）
参考答案：
答案解析：