测定宝石吸收光谱的仪器是（），其仪器可分成（）式和（）式两种。
参考答案：分光镜、棱镜、光栅
读短文，判断对(√)错(×)。
It was Saturday. Tom stayed at home. His parents went to visit his grandparents in another city. Tom did his
homework and read books. After lunch, he watched TV and played basketball with Jack. He felt very tired. In
the evening, his parents came back and brought him some presents. They were a schoolbag and a basketball.
Tom felt very excited!
( ) 1. Tom didn't visit his grandparents.
( ) 2. Tom read books in the afternoon.
( ) 3. Tom felt tired after reading books.
( ) 4. Tom's parents bought a new schoolbag for him.
( ) 5. Tom was happy in the evening.
各型脂溢性角化病具有的共同组织病理学特点为（）
A.角化过度，棘层无明显增生肥厚
B.棘层增生肥厚，瘤细胞在表皮内呈团块状分布
C.棘层增生肥厚，黑素细胞增多，呈巢状分布
D.增生的瘤细胞出现异形性并见角化不良细胞
E.角化过度、棘层肥厚和 * * 瘤样增生
