单选题 圆心为(1,-2),半径为 的圆在x轴上截得的弦长为( ).
8
6
单选题 The engine gives _____ smoke and steam.
up
in
away
off
单选题 The sales representative from Correct Copies, Ltd, returned Mr. Yoshida’s call while he was _____.
through
along
out
aside
单选题 The train leaves at 6:00 p. m., so I have to be at the station _____ 5:00 p. m. at the latest.
until
after
by
around
单选题 与点P(-1,2)距离为 的直线方程是( ).
2x+y-10=0或2x+y-6=0
3x=2或3y=2
y=8或x=8
4x+3y=0或4x+3y-4=0