Current location - Health Preservation Learning Network - Healthy weight loss - (20 12? Gao 'an No.1 model) Which of the following equipment can be used to distinguish the two cups of unlabeled water and salt water shown is () A.B.C.D?
(20 12? Gao 'an No.1 model) Which of the following equipment can be used to distinguish the two cups of unlabeled water and salt water shown is () A.B.C.D?
A. Fix plasticine at one end of a pencil to make a simple densimeter, so that it floats in two cups of liquid. The shallower the immersion, the greater the density of the liquid, which is brine, and the equipment in Group A meets the requirements;

B, can't use related equipment to judge two cups of liquid, unqualified;

C, the density of liquid can be measured with a balance and a measuring cylinder, and salt water and water can be separated by comparing the density, so the equipment in Group C meets the requirements;

D. Immerse the metal box of the pressure gauge into two cups of liquid respectively to keep it at the same depth, and observe the difference of liquid level in the U-shaped tube, which shows that the liquid has a higher density and is brine, and the equipment in Group D meets the requirements.

So choose ACD. ..