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【单选题】
以下判断，正确的是（ ）A.
x=-1是方程2x+1=3的解
B.
x=4是方程5-3x=2（1-x）的解
C.
t=1是方程 t-1 3 =0 的解
D.
y=2是方程 1 2 y-1=3y-2 的解
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【简答题】颜色模式中色光三原色是指 、色料(印刷)三原色是指 。
【单选题】Young scientists cannot realize______ soon that existing scientific knowledge is not nearly so complete, certain and unalterable as many textbooks seems to imply.
A.
so
B.
very
C.
too
D.
such
【单选题】The jeweler assured Mr. White that the stone was a ___ diamond and not an imitation.
A.
graceful
B.
glittering
C.
genuine
D.
genius
【简答题】颜色三原色是指( )、( )、( )三色
【单选题】听力原文：M: Good morning . May I help you? W: Good morning. I' d like to get three 50-cent stamps. M: Here you are. One dollar and 50 cents in all, please Where are they?
A.
In a bank.
B.
At a post.
C.
In a department store.
【单选题】Why won't Mr. Stone come to the clinic tomorrow?
A.
He can't spare the time.
B.
The clinic will be closed.
C.
Dr.Milton won't come to work.
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