问答题

在△ABC中,∠B=60°,2AB=3BC,则tanA的值等于( ).
(A)-22.
(B)-32.
(C)32.
(D)±32.

A.
(A)-22.
(B)-32.
(C)32.
(D)±32.

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Suppose △ABC is a triangle with the side length of 2, D and E are moving points on the sides BC and AC. AD⊥BE at point M, then the length of Ms' trajectory is ( ).
(A)π/2.
(B)π/3.
(C)π/4.
(D)π/6.
(英汉词典:trajectory轨迹)

A.
(A)π/2.
(B)π/3.
(C)π/4.
(D)π/6.
(英汉词典:trajectory轨迹)

单项选择题

M: Dear, can you watch the football match with me?
W: Sorry, I have something to buy.
Q: Where is the woman going?（）

A．To the shops.
B．Home.
C．To her friend's house.
D．To school.