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No one knows ______effects the GM material might have on the food chain .
1年前
已知:Rt△ABC的直角顶点C,另一顶点A及斜边AB的中点D都在⊙O上,BC交⊙O于E. (1)如图1,若AC=CE,求∠B的度数; (2)如图2,若AC=6,BC=8,求⊙O的半径.
1年前
Difficulties are nothing _____we are not afraid of them.
1年前
We need to buy a new car. This old car won't _____ for very long. [ ]
1年前
It's a nice day. Let's go out for a walk.
1年前