预计在超车过程中与对面来车有会车可能时，应提前加速超越。
参考答案：错
欲用95%乙醇和蒸馏水配制70%乙醇1000ml，所取95%乙醇体积约为（）。
A.500ml
B.665ml
C.700ml
D.737ml
E.889ml
Three short blasts of the whistle means（）.
A.danger
B.I am in distress
C.the vessel is not under command (broken down)
D.I am operating astern propulsion
