Warning risk mothers were obese by eating more fish in pregnancy Children of mothers who eat too much fish during pregnancy, namely more than 3 meals / week, with the risk of obesity in the first year of life compared with children whose mothers ate less fish during pregnancy. US scientists have issued a warning on the study published in the Journal of the American Medical Association (JAMA) on 15 / 2. to draw conclusions on, the scientists of the University Crete has conducted analysis of more than 26,000 data pairs of mother and child in the US and many European countries Au.Ket found children whose mothers ate more than three servings of fish per week during pregnancy with risk of overweight, higher obesity compared to children whose mothers ate fish less. In addition, mothers who ate more fish also increases the risk of other harmful chemicals commonly found in fish, particularly mercury, causing complications for pregnant nhi.Theo scientists, fish and other seafood providing ample nutrition for pregnant women and their unborn babies, to help children develop the brain. However, pregnant women should be noted only eat up to three servings of fish per week, especially those types of fish to eat only natural, not contaminated.

Hai chất hữu cơ X₁ và X₂ đều có khối luợng phân tử bằng 60 đvC. X₁ có khả năng phản ứng với: Na, NaOH, Na₂CO₃; X₂ phản ứng với NaOH (đun nóng) nhung không phản ứng Na. Công thức cấu tạo của X₁, X₂ lần luợt là

A. CH₃COOH, HCOOCH₃.

B. CH₃COOH, CH₃COOCH₃.

C. HCOOCH₃, CH₃COOH.

D. (CH₃)₂CHOH, HCOOCH₃.

85% bn ơi

biện pháp phòng chống bệnh giun:

-đối với cá nhân :

+rửa tay trước khi ăn và sau khi đi vệ sinh

+ăn chín uống sôi

+thức ăn phải đậy kín để tránh ruồi,nhặng

+tẩy giun định kì

-đối với cộng đồng:

+mỗi người phải biết giữ vệ sinh môi trường

+không tưới rau, hoa bằng phân tươi

+tiêu diệt ruồi,nhặng