1. The value of the arithmetic square root-2 of estimate 27 is () A. It's between 1 and 2 B. It's between two and three C. It's between three and four D. It's between four and five 2. There are five propositions 1 / zero is the smallest real number 2 / points on the number axis cannot represent all real numbers 3. Irrational number is the number with root sign The cube root of - 1 / 27 is ± 1 / 3 5. There are two square roots of a positive number, which are opposite to each other The correct ones are: () A. 1 B.2 C.3 D.4

1. The value of the arithmetic square root-2 of estimate 27 is () A. It's between 1 and 2 B. It's between two and three C. It's between three and four D. It's between four and five 2. There are five propositions 1 / zero is the smallest real number 2 / points on the number axis cannot represent all real numbers 3. Irrational number is the number with root sign The cube root of - 1 / 27 is ± 1 / 3 5. There are two square roots of a positive number, which are opposite to each other The correct ones are: () A. 1 B.2 C.3 D.4

The arithmetic square root of 1.27 is between 5 and 6, so the value of arithmetic square root - 2 of 27 is between 3 and 4. Choose c2.1. Zero is the smallest real number. Wrong, real numbers include negative numbers. 2. The points on the number axis can't represent all real numbers. Wrong, the points on the number axis can represent all real numbers. 3. Irrational numbers are numbers with root signs