题目
用显微镜观察植物细胞时,从甲图到乙图,正确的操作步骤是( ) ①转动粗准焦螺旋;②转动细准焦螺旋;③调节光圈; ④转动转换器;⑤移动装片. A.⑤→①→②→④ B.⑤→③→②→④ C.⑤→④→③→② D.①→②→③→④ 答案:C
Mr.Smith, ________ of the ________ speech, started to read a novel.
[ ]
A.
tired; boring
B.
tiring; bored
C.
tired; bored
D.
tiring; boring