用计算器验证,下列等式中正确的是( )
A:sin18°24′+sin35°26′=sin54°
B:sin65°54′﹣sin35°54′=sin30°
C:2sin15°30′=sin31°
D:sin70°18′﹣sin12°18′=sin47°42′
Mike is a middle school student. He goes to school from Monday to Friday. His home is about 5 miles from school. He usually walks to school. It takes him 30 minutes to walk there. Nancy's home is a little farther. It's 20 miles from school. So she often takes the school bus. It takes her 15 minutes to get to school. Bob lives outside the city. It's a town 30 miles away from his school. He takes the subway. It takes him 8 minutes to get to school by subway. He can have breakfast at home and then leave for the subway station. He studies very hard.
用“/”划分下面诗句的朗读节奏。(每句只划一处)
巴 山 楚 水 凄 凉 地,二 十 三 年 弃 置 身。