公园园林设计时使用的材料不要有污染，以防危害身体健康，体现了其健康性标准。
参考答案：错
砌块当竖缝宽度大于（）mm时，应用C20及以上细石砼填实
A.15
B.20
C.30
D.40
A client with type 1 (insulin-dependent) diabetes mellitus has just learned she’s pregnant. The nurse is teaching her about insulin requirements during pregnancy. Which guideline should the nurse provide（）
A. "Insulin requirements don’t change during pregnancy. Continue your current regimen. "
B. "Insulin requirements usually decrease during the last two trimesters. "
C. "Insulin requirements usually decrease during the first trimester. "
D. "Insulin requirements increase greatly during labor. "
