整修应按照()的原则,由内膛到外围;由主枝茎部向上修剪;先修大枝,再修中枝,最后修小枝;最后进行复查避免差错或遗漏。
A.由树角到茎部
B.由茎部到树角
C.由上到下
参考答案:B
若用同一显微镜观察同一标本4次,每次仅调整目镜或物镜和细准焦螺旋,结果得到下面各图。试问其中视野最暗的是[ ]
A.
B.
C.
D.
Woman: Excuse me; could you bring me a glass of water, please Man: Sorry, but I’m not a waiter. Question: What does the man mean
A. He wants a glass of water.B. He won’t do as the woman asks.C. He can’t wait any longer.D. He’s looking for the waiter.