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190310	$$\frac{4- \sqrt{28}}{\sqrt{9+7}}$$ = ?
190310	Is b even? 1:$$b^a+a$$ is even. 2:$$a^b+b$$ is even.
190310	$$A_1B_1C_1D_1$$,$$A_2B_2C_2D_2$$,$$A_3B_3C_3D_3$$are square.$$A_1B_1C_1D_1$$,$$A_2B_2C_2D_2$$are midpoints. What is the ratio of the area of the shaded part to the area of the unshaded part?
190310	A, B is independent events. The probability of occurrence of event a is 1/3, and that of event B is 1/2. What is the probability of at least one occurrence in A and B?
190310	学校向优秀学生发放奖学金.一等奖得主每人奖励$125.二等奖得主每人奖励$40.三等奖得主每人奖励$15.学校共发了$1780.请问至少有多少人能拿到奖学金?
190310	An empty pool will be poured with water at the speed of 50L/min. The volume of the pool is 120m^3. How long will it take to fill the pool?
190310	Is \|x\|>\|y\|? 1:x/y>0 2:xy>0
190310 还原机经选题: 文字题&几何	A company consists of managers and employees. What is the total number of people in this company? 1: Managers account for 1/4 of the total number of managers, of which women account for 2/3. 2: The company has a total of 600 male managers.
190310	∠A-(∠B+∠C)=0°.∠A=?
190310	The cost of each table is $50. The cost of each chair is $5. The profit of the table is 30% of the cost. The profit of the chair is 50% of the cost. A furniture store sold five times as many chairs as tables. The total profit on tables and chairs was $550. What's the total price of the tables and chairs sold?
190310	In a pentagonal ABCDE, ∠A=∠B=∠C=∠D. ∠E is the smallest of the five angles. ∠A=?
190310	Is the quadrilateral ABCD a square? (1)AC=BD (2)∠A=90°
190310	$$(x^2+bx-1)(x^2-bx+1)=x^4-9x^2+6x-1$$.b>0,b=?
190310	p,s are different integers. How many factors does $$ps^2$$ have? 1: p,s are prime numbers. 2: p,s are odd.
190310	∠ABM=45°, EF//MN. Quadrilateral ABCD is rectangular. AB=? 1:AE=8 2:BF=25
190310	A belt connects the two rotating rollers. The length of the belt is 2m. The diameter of the rollers is 0.2m. What is the distance between the center of the two rollers?
190310	x+2y+3z=5,2x+3y+4z=17,x+y+z=?
190310	A teacher graded 10 students. If the teacher added X points to the score of each student on the basis of the original one, or reduced Y points to that of each student. What was the difference between the average scores in the two cases? 1:X+Y=20 2:X-Y =4
190310	a,b,c are non-zero one-digit number. abc is a three-digit integer with hundreds digit as a, tens digit as b, and unit digit as c. bac is a three-digit integer with hundreds digit as b, tens digit as a, and unit digit as c. abc+bac= 998. How many possibilities are there for the value of a,b,c?
190310	a,b,c,d are integers. abcd-a-b-d=? 1:d²≥289 2:a²+b²+c²+d²=289