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【单选题】
In the Skills Power Station, Jason, Yuan Shu and Yinan talked about _______.
A.
predictions
B.
comparisons
C.
suggestions
D.
giving directions
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】$\lim_{x\to 3^+} \, \frac{3}{\left| x-3\right| }$
A.
$+\infty$
B.
$-\infty$
C.
1
D.
-1
【单选题】In _____, nodding your head up and down means “yes”, while in some parts in ______, this motion can mean “no.” But in ______, nodding your head is a polite way to say “I heard you.”
A.
the United States; southeast Asia and China; Greece and Turkey;
B.
Greece and Turkey; southeast Asia and China; the United States;
C.
the United States; Greece and Turkey; southeast Asia and China
D.
Greece and Turkey; the United States; southeast Asia and China
【单选题】$\arctan (-\sqrt{3})=$
A.
$-\frac{\pi}{3}$
B.
$\frac{\pi}{6}$
C.
$\frac{\pi}{3}$
D.
$-\frac{\pi}{6}$
【单选题】根据本题题干回答以下（1）（2）题在某城市中发行3种报纸A,B,C，经调查表明，订阅A报的有30%，订阅B报的有35%，订阅C报的有30%，同时订阅A报及B报的有10%，同时订阅A报及C报的有8%, 同时订阅B报及C报的有5%,同时订阅A,B,C报的有3%，试问满足下列条件的人数所占总人数比例（1）、正好订两种报纸的
A.
14%
B.
17%
C.
12%
D.
23%
【单选题】下面方程的图像是函数的是
A.
$x^2+y^2=1$
B.
$x^4+y^4=1$
C.
$\sin (xy)=\frac{1}{2}$
D.
$|x+1|+|y-1|=0$
【单选题】设一个质点落在$xOy$平面上由$x轴，y轴及直线x+y=1$所围成的三角形内，而落在这三角形内各点处的可能性相等，即落在这三角形内任何区域上的概率与这区域的面积成正比，试求此质点还满足的$y<2x$概率是多少
A.
$\frac{2}{3}$
B.
$\frac{1}{2}$
C.
$\frac{1}{3}$
D.
$\frac{3}{4}$
【单选题】$\lim_{x\to 0} \, \frac{\sqrt{x+3}-\sqrt{3}}{x}$
A.
$\frac{1}{2 \sqrt{3}}$
B.
$\frac{1}{ \sqrt{3}}$
C.
${2 \sqrt{3}}$
D.
${\sqrt{3}}$