后热既可以防止产生热裂纹,又可以防止产生冷裂纹。( )
参考答案:错
男性儿童,10岁,身高1 m,智力低下。应考虑为哪一种内分泌激素分泌障碍
A.胰岛素
B.甲状腺激素
C.肾上腺皮质激素
D.生长激素
E.性激素
The speaker believes that a practical solution to the problem of starvation is to remove obstacles to adequate supply of food rather than to increase production of it.
A.True
B.False