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190215	The line $$l_1$$ goes through (5,p) and (1,3). The equation of line $$l_2$$ is x-2y-6=0 . What is the value of p when $$l_1$$ parallels to $$l_2$$ ?
190215	t is a natural number. s is the sum of six consecutive integers larger than t. p is the sum of six consecutive integers larger than t+6. p-s=?
190215	\|p-n\|=6.5. Which of the following conclusions holds that n is greater than 10?
190215	f(x)=a$$(x+h)^{2}$$+k.a=? 1:f(2)=2 2:f(-1)=-4,f(x) ≤ 4
190215	Which of the following meets the equation $$t^{4}$$-38$$t^{3}$$+72$$t^{2}$$=0?
190215	a=$$2^{4}$$,b=$$a^{4}$$,$$2^{x}$$=$$a^{b}$$.x=?
190215	The probability of event a is X. Possibility of event B is Y. The possibility of simultaneous occurrence of event AB is Z. What is the possibility of at least one event happen in A and B?
190215	The weight W of the object on the earth and the distance r between the object and the center of the earth satisfy the equation W=K/r^2. When r = 4000, w = 200. When r = 5000, what is w equal to?
190215	The rectangle is x in length and y in width. If the length increases by 20%, the width increases by 30%, and the area of the rectangle increases by what percentage?
190215	At 9:10, the cinema started to show movie A with a duration of 92min. Movie B with a duration of 87min started to show at 9:35, and movie C with a duration of 117min started to show at 9:52. If two films were shown at the same time, staff were required to sell popcorn. What is the proportion of time between 9:00-11:00 when the staff need to sell popcorn?
190215	$$a^{2}$$ - $$b^{2}$$=21.$$a^{4}$$ - $$b^{4}$$=? 1:a+b=-3 2:a-b=7
190215	what is the maximum factor of $$24^{27}$$ in the following options?
190215	In concentric rings, the radius of the small circle is 60, and the width of the ring is 10. What is the ratio of the area of the ring to the area of the large circle?
190215 还原机经选题	There are two four digit abcd,dcba. 1 ≤ a, b, c, d ≤ 9. a,b,c,d are natural numbers and may be equal. What is the maximum value of abcd - dcba?
190215	The length of three sides of an obtuse triangle is 9,40, x. What is the possible value of x?
190215	$$\frac{0.8^{-5}}{0.4^{-4}}$$=?
190215	What is the reminder when n is divided by 8? 1: The reminder is 1 when n is divided by 2. 2: The reminder is 2 when n is divided by 3.
190215	There were 560 people in the company. The number of managers was 15% of the total. Later, 10 new managers and 24 ordinary employees were recruited. What's the proportion of the total number of managers now?
190215	x,y,z are positive integers that are larger than 1. x+y+z=? 1:x-y-z=1 2:xyz=231
190215	x,y,z are consecutive positive integers. xyz=858. What is the value of x+y+z=?