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【单选题】
在图形窗口中的指定位置标注文字的命令是( )A.
title(x,y,'y=sin(x)');
B.
xlabel(x,y,'y=sin(x)');
C.
text(x,y,'y=sin(x)' );
D.
legend(x,y,'y=sin(x)');
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举一反三
【单选题】—You have a nice watch. —Thank you. I _____ it since I got married. [ ]
A.
had
B.
bought
C.
have had
D.
have bought
【单选题】That is a nice watch. I wish I ______ one like that.
A.
have
B.
had
C.
have had
D.
can have
【单选题】That is a nice watch.I wish l______one like it.
A.
have
B.
had
C.
have had
D.
can have
【单选题】From the text, we can infer that
A.
computers will be easy to operate
B.
automobile will be move comfortable
C.
illiteracy rate will be down
D.
computers will be set in.automobiles
【单选题】已知下列反应在 1123K 时的标准平衡常数: ( 1 ) C( 石墨 ) + CO 2 (g) → 2CO(g) , K 1 θ = 1.3×10 14 ( 2 ) CO(g) + Cl 2 (g) → COCl 2 (g) , K 2 θ = 6.0×10 -3 则反应 2COCl 2 (g) → C( 石墨 ) + CO 2 (g) + 2Cl 2 (g) 在 1123K 时的 K θ 值为
A.
78
B.
2.1×10 -10
C.
4.6×10 -17
D.
7.8×10 -10
【单选题】— You have a nice watch. — Thank you. I _______ it since two years ago.
A.
had
B.
bought
C.
have had
D.
have bought
【单选题】Whatever Happens to Old Computers? You have just got a new computer and you are delighted with it. It is doing everything you wanted your new computer to do. But what are you going to do with your old...
A.
repair it
B.
threw it away
C.
sell it at a high price
D.
put it in a safe place for future use
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