常见的HP LaserJet打印机属于针式打印机。
参考答案:错
阅读短文,判断下列句子正(T)误(F)。
It is the first day of school. Sam wants to go back to school. He wants to see his friends. He wants to
meet his new teacher.
Sam gets up at six in the morning. He washes his face and eats breakfast. Then he goes to school by bus.
He sees his friends on the playground (操场). He plays games with them. In the classroom Sam meets his new
teacher. Her name is Miss White. Sam likes her very much.
( ) 1. Sam gets up at six o'clock.
( ) 2. Sam likes his new teacher very much.
( ) 3. Sam's new teacher is Miss Green.
( ) 4. Sam goes to school by bike.
( ) 5. Sam meets his new teacher in the classroom.
取一小块钠放在玻璃燃烧匙里加热,下列实验现象正确的是 [ ]
①金属先熔化 ②在空气中燃烧火焰呈黄色 ③燃烧时火星四射 ④燃烧后生成淡黄色固体 ⑤燃烧后生成白色固体
A、①②③
B、①②④
C、①②⑤
D、①③⑤